NEET Practice Paper 2020 – MCQIndia NEET

NEET Practice Paper 2020 (E1)

This quiz is in the format of Exam, has 180 questions. Results are displayed at end.

Total time duration : 3 hrs or 180 Minutes
Points to remember
- Right answer : +4
- Wrong Answer : -1
- Number of attempts : Unlimited

1 / 180

Which of the following is not an attribute of a population ?

Sex ratio

Natality

Mortality

Species interaction

2 / 180

The process of growth is maximum during

Log phase

Lag phase

Senescence

Dormancy

3 / 180

The roots that originate from the base of the stem are :

Fibrous roots

Primary roots

Prop roots

Lateral roots

4 / 180

Match the following diseases with the causative organism and select the correct option.

Column - I	Column - II
(a) Typhoid	(i) Wuchereria
(b) Pneumonia	(ii) Plasmodium
(c) Filariasis	(iii) Salmonella
(d) Malaria	(iv) Haemophilus A

(a) (b) (c) (d) -> (i) (iii) (ii) (iv)

(a) (b) (c) (d) -> (iii) (iv) (i) (ii)

(a) (b) (c) (d) -> (ii) (i) (iii) (iv)

(a) (b) (c) (d) -> (iv) (i) (ii) (iii)

5 / 180

In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?

ZIFT and IUT

GIFT and ZIFT

ICSI and ZIFT

GIFT and ICSI

6 / 180

Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood

The gene (I) has three alleles.

A person will have only two of the three alleles.

When IA and IB are present together, they express same type of sugar.

Allele ‘i’ does not produce any sugar.

7 / 180

Choose the correct pair from the following

Ligases -> Join the two DNA molecules

Polymerases -> Break the DNA into fragments

Nucleases -> Separate the two strands of DNA

Exonucleases -> Make cuts at specific positions within DNA

8 / 180

Select the correct match

Haemophilia -> Y linked

Phenylketonuria -> Autosomal dominant trait

Sickle cell anaemia -> Autosomal recessive trait, chromosome-11

Thalassemia -> X linked

9 / 180

Match the following columns and select the correct option.

Column - I	Column - II
(a) Gregarious, polyphagous pest	(i) Asterias
(b) Adult with radial symmetry and larva with bilateral symmetry	(ii) Scorpion
(c) Book lungs	(iii) Ctenoplana
(d) Bioluminescence	(iv) Locusta

a b c d -> (i) (iii) (ii) (iv)

a b c d ->(iv) (i) (ii) (iii)

a b c d ->(iii) (ii) (i) (iv)

a b c d ->(ii) (i) (iii) (iv)

10 / 180

The infectious stage of Plasmodium that enters the human body is

Trophozoites

Sporozoites

Female gametocytes

Male gametocytes

11 / 180

Identify the substances having glycosidic bond and peptide bond, respectively in their structure

Chitin, cholesterol

Glycerol, trypsin

Cellulose, lecithin

Inulin, insulin

12 / 180

The plant parts which consist of two generations - one within the other :
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule

(a) only

(a), (b) and (c)

(c) and (d)

(a) and (d)

13 / 180

The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are

Ammonia alone

Ammonia alone Nitrate alone

Ammonia and oxygen

Ammonia and hydrogen

14 / 180

Identify the correct statement with regard to G1 phase (Gap 1) of interphase.

DNA synthesis or replication takes place.

Reorganisation of all cell components takes place.

Cell is metabolically active, grows but does not replicate its DNA.

Nuclear Division takes place.

15 / 180

Cuboidal epithelium with brush border of microvilli is found in :

Lining of intestine

Ducts of salivary glands

Proximal convoluted tubule of nephron

Eustachian tube

16 / 180

Which of the following statements about inclusion bodies is incorrect ?

They are not bound by any membrane.

These are involved in ingestion of food particles.

They lie free in the cytoplasm.

These represent reserve material in cytoplasm

17 / 180

Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells ?

Endoplasmic reticulum

Peroxisomes

Golgi bodies

Polysomes

18 / 180

In gel electrophoresis, separated DNA fragments can be visualized with the help of :

Acetocarmine in bright blue light

Ethidium bromide in UV radiation

Acetocarmine in UV radiation

Ethidium bromide in infrared radiation

19 / 180

Identify the wrong statement with reference to transport of oxygen.

Binding of oxygen with haemoglobin is mainly related to partial pressure of O₂

Partial pressure of CO₂ can interfere with O2 binding with haemoglobin

Higher H+ conc. in alveoli favours the formation of oxyhaemoglobin.

Low pCO₂ in alveoli favours the formation of oxyhaemoglobin.

20 / 180

Ray florets have

Inferior ovary

Superior ovary

Hypogynous ovary

Half inferior ovary

21 / 180

The specific palindromic sequence which is recognized by EcoRI is

5' - GAATTC - 3' 3' - CTTAAG - 5'

5' - GGAACC - 3' 3' - CCTTGG - 5'

5' - CTTAAG - 3' 3' - GAATTC - 5'

5' - GGATCC - 3' 3' - CCTAGG -5

22 / 180

Identify the wrong statement with regard to Restriction Enzymes.

Each restriction enzyme functions by inspecting the length of a DNA sequence.

They cut the strand of DNA at palindromic sites.

They are useful in genetic engineering.

Sticky ends can be joined by using DNA ligases

23 / 180

Which of the following is put into Anaerobic sludge digester for further sewage treatment ?

Primary sludge

Floating debris

Effluents of primary treatment

Activated sludge

24 / 180

Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases

(a) and (b)

(c) and (d)

(a), (b) and (d)

only (d)

25 / 180

If the head of cockroach is removed, it may live for few days because

the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.

the cockroach does not have nervous system.

the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.

the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.

26 / 180

Which of the following statements are true for the phylum-Chordata ?
(a) In Urochordata notochord extends from head to tail and it is present throughout their life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.

(d) and (c)

(c) and (a)

(a) and (b)

(b) and (d)

27 / 180

Match the organism with its use in biotechnology.

Column - I	Column - II
(a) Bacillus thuringiensis	(i) Cloning vector
(b) Thermus aquaticus molecule	(ii) Construction of first rDNA
(c) Agrobacterium tumefaciens	(iii) DNA polymerase
(d) Salmonella typhimurium	(iv) Cry proteins

(a) (b) (c) (d) -> (ii) (iv) (iii) (i)

(a) (b) (c) (d) -> (iv) (iii) (i) (ii)

(a) (b) (c) (d) -> (iii) (ii) (iv) (i)

(a) (b) (c) (d) -> (iii) (iv) (i) (ii)

28 / 180

Match the following concerning essential elements and their functions in plants

Column - I	Column - II
(a) Iron	(i) Photolysis of water
(b) Zinc	(ii) Pollen germination
(c) Boron biosynthesis	(iii) Required for chlorophyll
(d) Manganese	(iv) IAA biosynthesis

(a) (b) (c) (d) -> (ii) (i) (iv) (iii)

(a) (b) (c) (d) -> (iv) (iii) (ii) (i)

(a) (b) (c) (d) -> (iii) (iv) (ii) (i)

(a) (b) (c) (d) -> (iv) (i) (ii) (iii)

29 / 180

Identify the incorrect statement.

Heart wood does not conduct water but gives mechanical support.

Sapwood is involved in conduction of water and minerals from root to leaf.

Sapwood is the innermost secondary xylem and is lighter in colour.

Due to deposition of tannins, resins, oils etc., heart wood is dark in colour

30 / 180

Match the following :

Column - I	Column - II
(a) Inhibitor of catalytic activity	(i) Ricin
(b) Possess peptide bonds	(ii) Malonate
(c) Cell wall material in fungi	(iii) Chitin
(d) Secondary metabolite	(iv) Collagen

a->(ii), b->(iv), c->(iii), d->(i)

a->(iii), b->(i), c->(iv), d-> (ii)

a->(iii), b->(iv), c->(i), d-> (ii)

a->(ii), b->(iii), c->(i), d-> (iv)

31 / 180

Meiotic division of the secondary oocyte is completed

Prior to ovulation

At the time of copulation

After zygote formation

At the time of fusion of a sperm with an ovum

32 / 180

According to Robert May, the global species diversity is about

1.5 million

20 million

50 million

7 million

33 / 180

The first phase of translation is

Binding of mRNA to ribosome

Recognition of DNA molecule

Aminoacylation of tRNA

Recognition of an anti-codon

34 / 180

Which of the following regions of the globe exhibits highest species diversity ?

Western Ghats of India

Madagascar

Himalayas

Amazon forests

35 / 180

Which of the following statements is not correct ?

In man insulin is synthesised as a proinsulin.

The proinsulin has an extra peptide called C-peptide.

The functional insulin has A and B chains linked together by hydrogen bonds.

Genetically engineered insulin is produced in E-Coli

36 / 180

The transverse section of a plant shows following anatomical features :

(a) Large number of scattered vascular bundles surrounded by bundle sheath.
(b) Large conspicuous parenchymatous ground tissue.
(c) Vascular bundles conjoint and closed.
(d) Phloem parenchyma absent.

Identify the category of plant and its part :

Monocotyledonous stem

Monocotyledonous root

Dicotyledonous stem

Dicotyledonous root

37 / 180

Match the following columns and select the correct option.

Column - I	Column - II
a) 6 - 15 pairs of gill slits	i) Trygon
b) Heterocercal caudal fin	ii) Cyclostomes
c) Air Bladder	iii) Chondrichthyes
d) Poison sting	iv) Osteichthyes

a-> (ii),b-> (iii),c-> (iv),d-> (i)

a-> (iii),b-> (iv),c-> (i),d-> (ii)

a-> (iv),b-> (ii),c-> (iii),d-> (i)

a-> (i),b-> (iv),c-> (iii),d-> (ii)

38 / 180

From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask

CH₄ , H₂ , NH₃ and water vapor at 800°C

CH₃ , H₂ , NH₄ and water vapor at 800°C

CH₄ , H₂ , NH₃ and water vapor at 600°C

CH₃ , H₂ , NH₃ and water vapor at 600°C

39 / 180

Embryological support for evolution was disapproved by

Karl Ernst von Baer

Alfred Wallace

Charles Darwin

Oparin

40 / 180

The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is

Transpiration

Inhibition

Root Pressure

Plasmolysis

41 / 180

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their

Nutritive value

Growth response

Defence action

Effect on reproduction

42 / 180

The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of :

2 molecules of 3-C compound

1 molecule of 3-C compound

1 molecule of 6-C compound

1 molecule of 4-C compound and 1 molecule of 2-C compound

43 / 180

Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to :

Insect pests

Fungal diseases

Plant nematodes

Insect predators

44 / 180

Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action ?

(a) Darwin’s Finches of Galapagos islands.
(b) Herbicide resistant weeds.
(c) Drug resistant eukaryotes.
(d) Man-created breeds of domesticated animals like dogs

only (a)

(a) and (c)

(b), (c) and (d)

only (d)

45 / 180

Identify the wrong statement with reference to immunity.

When exposed to antigen (living or dead) antibodies are produced in the host’s body. It is called “Active immunity”.

When ready-made antibodies are directly given, it is called “Passive immunity”.

Active immunity is quick and gives full response.

Foetus receives some antibodies from mother, it is an example for passive immunity

46 / 180

By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams ?

Out crossing

Mutational breeding

Cross breeding

Inbreeding

47 / 180

Identify the correct statement with reference to human digestive system.

Ileum opens into small intestine.

Serosa is the innermost layer of the alimentary canal.

Ileum is a highly coiled part.

Vermiform appendix arises from duodenum

48 / 180

Match the following columns and select the correct option.

Column - I	Column - II
a) Clostridium butylicum	i) Cyclosporin-A
b) Trichoderma polysporum	ii) Butyric Acid
c) Monascus purpureus	iii) Citric Acid
d) Aspergillus niger	iv) Blood cholesterol lowering agent

a-> (iii) , b->(iv) , c->(ii) , d->(i)

a->(ii) , b->(i) , c->(iv) , d->(iii)

a->(i) , b->(ii) , c->(iv) , d->(iii)

a->(iv) , b->(iii) , c->(ii) , d->(i)

49 / 180

Presence of which of the following conditions in urine are indicative of Diabetes Mellitus ?

Uremia and Ketonuria

Uremia and Renal Calculi

Ketonuria and Glycosuria

Renal calculi and Hyperglycaemia

50 / 180

Floridean starch has structure similar to :

Starch and cellulose

Amylopectin and glycogen

Mannitol and algin

Laminarin and cellulose

51 / 180

Select the option including all sexually transmitted diseases.

Gonorrhoea, Syphilis, Genital herpes

Gonorrhoea, Malaria, Genital herpes herpes

AIDS, Malaria, Gonorrhoea, Genital herpes

Cancer, AIDS, Syphilis

52 / 180

Match the following with respect to meiosis :

Column - I	Column - II
(a) Zygotene	(i) Terminalization
(b) Pachytene	(ii) Chiasmata
(c) Diplotene	(iii) Crossing over
(d) Diakinesis	(iv) Synapsis

Select the correct option from the following :

a->(iii) , b->(iv) , c->(i) , d->(ii)

a->(iv) , b->(iii) , c->(ii) , d->(i)

a->(i) , b->(ii) , c->(iv) , d->(iii)

a->(ii) , b->(iv) , c->(iii) , d->(i)

53 / 180

Which of the following pairs is of unicellular algae ?

Laminaria and Sargassum

Gelidium and Gracilaria

Anabaena and Volvox

Chlorella and Spirulina

54 / 180

Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle ?

High concentration of Estrogen

High concentration of Progesterone

Low concentration of LH

Low concentration of FSH

55 / 180

Match the following columns and select the correct option.

	Column - I		Column - II
a	Bt cotton	i	Gene therapy
b	Adenosine deaminase deficiency	ii	Cellular defence
c	RNAi	iii	Detection of HIV infection
d	PCR	iv	Bacillus thuringiensis

a->(iv),b-> (i), c->(ii) ,d->(iii)

a->(iii),b-> (ii), c-> (i) ,d-> (iv)

a->(ii) ,b-> (iii), c-> (iv) ,d->(i)

a->(i) ,b-> (ii) , c->(iii) ,d->(iv)

56 / 180

Montreal protocol was signed in 1987 for control of :

Transport of Genetically modified organisms from one country to another

Emission of ozone depleting substances

Release of Green House gases

Disposal of e-wastes

57 / 180

Which of the following is correct about viroids ?

They have RNA with protein coat.

They have free RNA without protein coat.

They have DNA with protein coat.

They have free DNA without protein coat.

58 / 180

The ovary is half inferior in

Brinjal

Mustard

Sunflower

Plum

59 / 180

The enzyme enterokinase helps in conversion of :

protein into polypeptides

trypsinogen into trypsin

caseinogen into casein

pepsinogen into pepsin

60 / 180

Match the trophic levels with their correct species examples in grassland ecosystem.

	Column - I		Column - II
a	Fourth trophic level	i	Crow
b	Second trophic level	ii	Vulture
c	First trophic level	iii	Rabbit
d	Third trophic level	iv	Grass

Select the correct option :

a->(ii) ,b>(iii) ,c>(iv) ,d->(i)

a->(iii) ,b>((ii) ,c>(i) ,d->(iv)

a->(iv) ,b>((iii) ,c>(ii) ,d->(i)

a->(i) ,b>((ii) ,c>(iii) ,d->(iv)

61 / 180

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits ?

4

2

14

8

62 / 180

Match the following columns and select the correct option.

	Column - I		Column - II
a	Organ of Corti	i	Connects middle ear and pharynx
b	Cochlea	ii	Coiled part of the labyrinth
c	Eustachian tube	iii	Attached to the oval window
d	Stapes	iv	Located on the basilar membrane

a->(ii), b-> (iii), c-> (i), d-> (iv)

a->(iii, b->) (i), c-> (iv), d-> (ii)

a->(iv), b-> (ii), c-> (i), d-> (iii)

a->(i), b-> (ii), c-> (iv), d-> (iii)

63 / 180

In water hyacinth and water lily, pollination takes place by

Insects or wind

Water currents only

Wind and waterwind and water

Insects and water

64 / 180

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.

Cytokinin

Gibberellin

Ethylene

Abscisic acid

65 / 180

In light reaction, plastoquinone facilitates the transfer of electrons from :

PS-II to Cytb6 f complex

Cytb6 f complex to PS-I

PS-I to NADP+

PS-I to ATP synthase

66 / 180

Which of the following is not an inhibitory substance governing seed dormancy ?

Gibberellic acid

Abscisic acid

Phenolic acid

Para-ascorbic acid

67 / 180

Name the enzyme that facilitates opening of DNA helix during transcription.

DNA ligase

DNA helicase

DNA polymerase

RNA polymerase

68 / 180

Which of the following would help in prevention of diuresis ?

More water reabsorption due to undersecretion of ADH

Reabsorption of Na+ and water from renal tubules due to aldosterone

Atrial natriuretic factor causes vasoconstriction

Decrease in secretion of renin by JG cells

69 / 180

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct ?

Gross primary productivity is always less than net primary productivity.

Gross primary productivity is always more than net primary productivity.

Gross primary productivity and Net primary productivity are one and same.

There is no relationship between Gross primary productivity and Net primary productivity.

70 / 180

Match the following columns and select the correct option.

	Column - I		Column - II
a	Placenta	i	Androgens
b	Zona pellucida	ii	Human Chorionic Gonadotropin (hCG)
c	Bulbo-urethral glands	iii	Layer of the ovum
d	Leydig cells	iv	Lubrication of the Penis

a->(iv), b-> (iii), c-> (i), d-> (ii)

a->(i), b-> (iv), c-> (ii), d-> (iii)

a->(iii), b-> (ii), c-> (iv), d-> (i)

a->(ii), b-> (iii), c-> (iv), d-> (i)

71 / 180

Strobili or cones are found in :

Salvinia

Pteris

Marchantia

Equisetum

72 / 180

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G₀).

This process occurs at the end of :

M phase

G₁ phase

S phase

G₂ phase

73 / 180

Flippers of Penguins and Dolphins are examples of :

Adaptive radiation

Convergent evolution

Industrial melanism

Natural selection

74 / 180

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6×10⁹ bp, then the length of the DNA is approximately :

2.0 meters

2.5 meters

2.2 meters

2.7 meters

75 / 180

The QRS complex in a standard ECG represents

Repolarisation of auricles

Depolarisation of auricles

Repolarisation of ventricles

Depolarisation of ventricles

76 / 180

Match the following columns and select the correct option.

	Column - I		Column - II
a	Eosinophils	i	Immune response
b	Basophils	ii	Phagocytosis
c	Neutrophils	iii	Release histaminase, destructive enzymes
d	Lymphocytes	iv	Release granules containing histamine

a->(iii), b-> (iv), c-> (ii), d-> (i)

a->(iv), b-> (i), c-> (ii), d-> (iii)

a->(i), b-> (ii), c-> (iv), d-> (iii)

a->(ii), b-> (i), c-> (iii), d-> (iv)

77 / 180

Which of the following statements is correct ?

Adenine pairs with thymine through two H-bonds.

Adenine pairs with thymine through one H-bond.

Adenine pairs with thymine through three H-bonds.

Adenine does not pair with thymine

78 / 180

The sequence that controls the copy number of the linked DNA in the vector, is termed :

Selectable marker

Ori site

Palindromic sequence

Recognition site

79 / 180

Identify the basic amino acid from the following.

Tyrosine

Glutamic Acid

Lysine

Valine

80 / 180

Match the following columns and select the correct option.

	Column - I		Column - II
a	Pituitary gland	i	Grave’s disease
b	Thyroid gland	ii	Diabetes mellitus
c	Adrenal gland	iii	Diabetes insipidus
d	Pancreas	iv	Addison’s disease

a->(iv), b-> (iii), c-> (i), d-> (ii)

a->(iii), b-> (ii), c-> (i), d-> (iv)

a->(iii), b-> (i), c-> (iv), d-> (ii)

a->(ii), b-> (i), c-> (iv), d-> (iii)

81 / 180

Select the correct statement.

Glucocorticoids stimulate gluconeogenesis.

Glucagon is associated with hypoglycemia.

Insulin acts on pancreatic cells and adipocytes.

Insulin is associated with hyperglycemia.

82 / 180

Which one of the following is the most abundant protein in the animals ?

Haemoglobin

Collagen

Lectin

Insulin

83 / 180

Experimental verification of the chromosomal theory of inheritance was done by :

Mendel

Sutton

Boveri

Morgan

84 / 180

Match the following columns and select the correct option.

	Column - I		Column - II
a	Floating Ribs	i	Located between second and seventh ribs
b	Acromion	ii	Head of the Humerus
c	Scapula	iii	Clavicle
d	Glenoid cavity	iv	Do not connect with the sternum

(a) (b) (c) (d) ->(ii) (iv) (i) (iii)

(a) (b) (c) (d) ->(i) (iii) (ii) (iv)

(a) (b) (c) (d) ->(iii) (ii) (iv) (i)

(a) (b) (c) (d) ->(iv) (iii) (i) (ii)

85 / 180

The number of substrate level phosphorylations in one turn of citric acid cycle is :

Zero

one

Two

Three

86 / 180

Dissolution of the synaptonemal complex occurs during :

Pachytene

Zygoten

Diplotene

Leptotene

87 / 180

Bilaterally symmetrical and acoelomate animals are exemplified by

Ctenophora

Platyhelminthes

Aschelminthes

Annelida

88 / 180

The body of the ovule is fused within the funicle at

Hilum

Micropyle

Nucellus

Chalaza

89 / 180

Goblet cells of alimentary canal are modified from

Squamous epithelial cells

Columnar epithelial cells

Chondrocytes

Compound epithelial cells

90 / 180

Snow-blindness in Antarctic region is due to :

Freezing of fluids in the eye by low temperature

Inflammation of cornea due to high dose of UV-B radiation

High reflection of light from snow

Damage to retina caused by infra-red ray

91 / 180

Identify a molecule which does not exist.

He₂

Li₂

C₂

O₂

92 / 180

Find out the solubility of Ni(OH)₂ in 0.1 M NaOH. Given that the ionic product of Ni(OH)₂ is 2×10^-15.

2×10^-13 M

2×10^-8 M

1×10^-13 M

1×10⁸ M

93 / 180

Identify the correct statements from the following :

a) CO₂ (g) is used as refrigerant for ice-cream and frozen food.
(b) The structure of C₆₀ contains twelve six carbon rings and twenty five carbon rings.
(c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
(d) CO is colorless and odourless gas.

(a), (b) and (c) only

(a) and (c) only

(b) and (c) only

(c) and (d) only

94 / 180

Hydrolysis of sucrose is given by the following reaction.
Sucrose+H₂O⇌Glucose+Fructose
If the equilibrium constant (K_C ) is 2×10¹³ at 300 K, the value of ∆_rG_s at the same temperature will be :

(1) −8.314 J mol^-1K^-1×300 K×ln(2×10¹³)

8.314 J mol^-1K^-1×300 K×ln(2×10¹³)

8.314 J mol^-1K^-1×300 K×ln(3×10¹³)

−8.314 J mol^-1K^-1×300 K×ln(4×10¹³)

95 / 180

Identify compound X in the following sequence of reactions

Options

1

2

3

4

96 / 180

Identify the incorrect match.

	Name		IUPAC Official Name
a	Unnilunium	i	Mendelevium
b	Unniltrium	ii	Lawrencium
c	Unnilhexium	iii	Seaborgium
d	Unununnium	iv	Darmstadtium

(a), (i)

(b), (ii)

(c), (iii)

(d), (iv)

97 / 180

An element has a body centered cubic (bcc) structure with a cell edge of 288 pm.

The atomic radius is :

√3 / 4 X 288 pm

√2 / 4 X 288 pm

4/√3 X 288 pm

4/√2 X 288 pm

98 / 180

Which of the following set of molecules will have zero dipole moment ?

Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene

Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene

Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene

Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene

99 / 180

On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be :

Hydrogen gas

Oxygen gas

H₂S gas

SO₂ gas

100 / 180

Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :

Isopropyl alcohol

Sec. butyl alcohol

Tert. butyl alcohol

Isobutyl alcohol

101 / 180

Which of the following oxoacid of sulphur has −O−O− linkage ?

H₂SO₃ , sulphurous acid

H₂SO₄, sulphuric acid

H₂S₂O₈ , peroxodisulphuric acid

H₂S₂O₇ , pyrosulphuric acid

102 / 180

Which of the following amine will give the carbylamine test

1

2

3

4

103 / 180

The calculated spin only magnetic moment of Cr²⁺ ion is

3.87 BM

4.90 BM

5.92 BM

2.84 BM

104 / 180

The correct option for free expansion of an ideal gas under adiabatic condition is :

(1) q=0, ∆T=0 and w=0

q=0, ∆T < 0 and w > 0

q < 0, ∆T=0 and w=0

q > 0, ∆T > 0 and w > 0

105 / 180

The freezing point depression constant (K_f) of benzene is 5.12 K kg mol_-1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places)

0.20 K

0.80 K

0.40 K

0.60 K

106 / 180

The number of Faradays(F) required to produce 20 g of calcium from molten CaCl₂ (Atomic mass of Ca=40 g mol^-1) is

1

2

3

4

107 / 180

Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as :

Aldol condensation

Cannizzaro’s reaction

Cross Cannizzaro’s reaction

Cross Aldol condensation

108 / 180

Paper chromatography is an example of :

Adsorption chromatography

Partition chromatography

Thin layer chromatography

Column chromatography

109 / 180

An increase in the concentration of the reactants of a reaction leads to change in :

Activation energy

Heat of reaction

Threshold energy

Collision frequency

110 / 180

A mixture of N₂ and Ar gases in a cylinder contains 7 g of N₂ and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N₂ is :
[Use atomic masses (in g mol^-1) : N=14, Ar=40]

9 bar

12 bar

15 bar

18 bar

111 / 180

Identify the correct statement from the following :

Wrought iron is impure iron with 4% carbon.

Blister copper has blistered appearance due to evolution of CO₂

Vapour phase refining is carried out for Nickel by Van Arkel method.

Pig iron can be moulded into a variety of shapes.

112 / 180

A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following ?

−I effect of −CH₃ groups

+R effect of −CH₃ groups

−R effect of −CH₃ groups

Hyperconjugation

113 / 180

Which of the following is a cationic detergent ?

Sodium lauryl sulphate

Sodium stearate

Cetyltrimethyl ammonium bromide

Sodium dodecylbenzene sulphonate

114 / 180

Elimination reaction of 2-Bromo-pentane to form pent-2-ene is :
(a) β-Elimination reaction
(b) Follows Zaitsev rule
(c) Dehydrohalogenation reaction
(d) Dehydration reaction

(a), (b), (c)

(a), (c), (d)

(b), (c), (d)

(a), (b), (d)

115 / 180

The mixture which shows positive deviation from Raoult’s law is :

Ethanol+Acetone

Benzene+Toluene

Acetone+Chloroform

Chloroethane+Bromoethane

116 / 180

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

SCN^-< F^- < C₂O₄^- < CN^-

SCN^-< F^- < CN^-< C₂O₄^-

F^- < SCN^-< C₂O₄^- < CN^-

CN^- < C₂O₄^- < SCN^-< F^-

117 / 180

Which of the following is a basic amino acid ?

Serine

Alanine

Tyrosine

Lysine

118 / 180

HCl was passed through a solution of CaCl₂ , MgCl₂ and NaCl. Which of the following compound(s) crystallise(s) ?

Both MgCl₂ and CaCl₂

Only NaCl

Only MgCl₂

NaCl, MgCl₂ and CaCl₂

119 / 180

Which of the following is a natural polymer ?

cis-1,4-polyisoprene

poly (Butadiene-styrene)

polybutadiene

poly (Butadiene-acrylonitrile

120 / 180

Which of the following is not correct about carbon monoxide ?

It forms carboxyhemoglobin.

It reduces oxygen carrying ability of blood.

The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.

It is produced due to incomplete combustion

121 / 180

Sucrose on hydrolysis gives :

β-D-Glucose+α-D-Fructose

α-D-Glucose+β-D-Glucose

α-D-Glucose+β-D-Fructose

α-D-Fructose+β-D-Fructose

122 / 180

The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.

Iron

Copper

Calcium

Potassium

123 / 180

Which one of the followings has maximum number of atoms ?

1 g of Ag(s) [Atomic mass of Ag=108]

1 g of Mg(s) [Atomic mass of Mg=24]

1 g of O₂ (g) [Atomic mass of O=16]

1 g of Li(s) [Atomic mass of Li=7]

124 / 180

The number of protons, neutrons and electrons in 175 Lu 71, respectively, are :

71, 104 and 71

104, 71 and 71

71, 71 and 104

175, 104 and 71

125 / 180

What is the change in oxidation number of carbon in the following reaction ?
CH₄ (g) + 4Cl₂ (g) → CCl₄ (l) + 4HCl(g)

+4 to +4

0 to +4

−4 to +4

0 to −4

126 / 180

Identify the incorrect statement.

Cr²⁺(d⁴ ) is a stronger reducing agent than Fe²⁺(d⁶ ) in water.

The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.

Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal l lattices of metals

The oxidation states of chromium in CrO₄^2- and Cr₂O₇^2- are not same.

127 / 180

For the reaction, 2Cl(g) → Cl₂ (g), the correct option is :

∆rH > 0 and ∆rS > 0

∆rH > 0 and ∆rS < 0

∆rH < 0 and ∆rS > 0

∆rH < 0 and ∆rS < 0

128 / 180

Measuring Zeta potential is useful in determining which property of colloidal solution ?

Viscosity

Solubility

Stability of the colloidal particles

Size of the colloidal particles

129 / 180

Urea reacts with water to form A which will decompose to form B. B when passed through Cu²⁺ (aq), deep blue colour solution C is formed.
What is the formula of C from the following ?

CuSO₄

[Cu(NH₃)₄ ] ²⁺

Cu(OH)₂

CuCO₃⋅Cu(OH)₂

130 / 180

Match the following and identify the correct option.

	Column - I		Column - II
a	CO(g)+H₂ (g)	i	Mg(HCO₃)₂+Ca(HCO₃)₂
b	Temporary hardness of water	ii	An electron deficient hydride
c	B₂H₆	iii	Synthesis gas
d	H₂O₂	iv	Non-planar structure

(a) (b) (c) (d) -> (iii) (i) (ii) (iv)

(a) (b) (c) (d) -> (iii) (ii) (i) (iv)

(a) (b) (c) (d) -> (iii) (iv) (ii) (i)

(a) (b) (c) (d) -> (i) (iii) (ii) (iv)

131 / 180

Match the following :

	Oxide		Nature
a	CO	i	Basic
b	BaO	ii	Neutral
c	Al₂O₃	iii	Acidic
d	Cl₂O₇	iv	Amphoteric

Which of the following is correct option?

(a) (b) (c) (d) -> (i) (ii) (iii) (iv)

(a) (b) (c) (d) -> (ii) (i) (iv) (iii)

(a) (b) (c) (d) -> (iii) (iv) (i) (ii)

(a) (b) (c) (d) -> (iv) (iii) (ii) (i)

132 / 180

The rate constant for a first order reaction is 4.606×10^-3 s^-1. The time required to reduce 2.0 g of the reactant to 0.2 g is :

100 s

200 s

500s

1000 s

133 / 180

An alkene on ozonolysis gives methanal as one of the product. Its structure is

1)2)

3)4)

1

2

3

4

134 / 180

Which of the following alkane cannot be made in good yield by Wurtz reaction ?

n-Hexane

2,3-Dimethylbutane

n-Heptane

n-Butane

135 / 180

Anisole on cleavage with HI gives :

1)2)3)4)

1

2

3

4

136 / 180

For which one of the following, Bohr model is not valid ?

Hydrogen atom

Singly ionised helium atom (He⁺)

Deuteron atom

Singly ionised neon atom (Ne⁺)

137 / 180

The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is : (c=speed of electromagnetic waves)

c : 1

1 : 1

1 : c

1 : c²

138 / 180

The Brewsters angle i_b for an interface should be :

0 < i_b< 30

30 < i_b< 45

45 < i_b< 90

i_b = 90

139 / 180

A cylinder contains hydrogen gas at pressure of 249 kPa and temperature 27⁰C.
Its density is : (R=8.3 J mol^-1 K^-1)

0.5 kg/m³

0.2 kg/m³

0.1 kg/m³

0.02 kg/m³

140 / 180

A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is µ, then the angle of incidence is nearly equal to :

A /2µ

2A/ µ

µA

A/ 2 µ

141 / 180

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is :

Isothermal

Adiabatic

Isochoric

Isobaric

142 / 180

The energy equivalent of 0.5 g of a substance is :

4.5×10¹⁶ J

4.5×10¹³ J

1.5×10¹³ J

0.5×10¹³ J

143 / 180

A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth ?

48 N

32 N

30 N

24 N

144 / 180

The solids which have the negative temperature coefficient of resistance are :

Metals

Insulators only

Semiconductors only

Insulators and semiconductor

145 / 180

The phase difference between displacement and acceleration of a particle in a simple harmonic motion is :

π rad

3 π/2 rad

π/2

zero

146 / 180

A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale. The pitch of the screw gauge is :

0.01 mm

0.25 mm

0.5 mm

1.0 m

147 / 180

In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequency of B will be :

523 Hz

524 Hz

536 Hz

537 Hz

148 / 180

Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass.
The centre of mass of the system from the 5 kg particle is nearly at a distance of :

33 cm

50 cm

67 cm

80 cm

149 / 180

Find the torque about the origin when a force of 3ĵ N acts on a particle whose position vector is 2 kˆ m

6 î N m

6 ĵ Nm

-6 î Nm

6 kˆ Nm

150 / 180

Light with an average flux of 20 W/cm² falls on a non-reflecting surface at normal incidence having surface area 20 cm². The energy received by the surface during time span of 1 minute is :

10×10³ J

12×10³ J

24×10³ J

48×10³ J

151 / 180

A spherical conductor of radius 10 cm has a charge of 3.2×10^-7C distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere ?

1.28×10⁴ N/C

1.28×10⁵ N/C

1.28×10⁶ N/C

1.28×10⁷N/C

152 / 180

In a certain region of space with volume 0.2 m³, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is :

zero

0.5 N/C

1 N/C

5 N/C

153 / 180

The increase in the width of the depletion region in a p-n junction diode is due to :

forward bias only

reverse bias only

both forward bias and reverse bias

increase in forward current

154 / 180

A 40 µF capacitor is connected to a 200 V, 50 Hz ac supply. The rms value of the current in the circuit is, nearly :

1.7 A

2.05 A

2.5 A

25.1 A

155 / 180

The mean free path for a gas, with molecular diameter d and number density n can be expressed as

1

2

3

4

156 / 180

For transistor action, which of the following statements is correct ?

Base, emitter and collector regions should have same doping concentrations.

Base, emitter and collector regions should have same size.

Both emitter junction as well as the collector junction are forward biased.

The base region must be very thin and lightly doped.

157 / 180

Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled ?

doubled

four times

one-fourth

zero

158 / 180

When a uranium isotope ²³⁵U₉₂is bombarded with a neutron, it generates ⁸⁹Kr₃₆ , three neutrons and :

¹⁴⁴Ba₅₆

⁹¹Zr₄₀

¹⁰¹Kr₃₆

¹⁰³Kr₃₆

159 / 180

The energy required to break one bond in DNA is 10^-20 J.

This value in eV is nearly

6

0.6

0.06

0.006

160 / 180

Two bodies of mass 4 kg and 6 kg are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is :

g

g/2

g/5

g/10

161 / 180

A wire of length L, area of cross section A is hanging from a fixed support. The length of the wire changes to L₁ when mass M is suspended from its free end. The expression for Young’s modulus is :

MgL₁/AL

Mg(L₁ -L)/ AL

MgL /AL₁

MgL /A(L₁- L)

162 / 180

The average thermal energy for a mono-atomic gas is : (k_B is Boltzmann constant and T is absolute temperature)

1/2 x k_BT

3/2 x k_BT

5/2 x k_BT

72 x k_BT

163 / 180

Which of the following graph represents the variation of resistivity (ρ) with temperature (T) for copper ?

1

2

3

4

164 / 180

The color code of a resistance is given below

The values of resistance and tolerance, respectively, are :

470 kΩ, 5%

47 kΩ, 10%

4.7 kΩ, 5%

470 Ω, 5%

165 / 180

In Young’s double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes :

double

half

four times

one-fourth

166 / 180

The capacitance of a parallel plate capacitor with air as medium is 6 µF. With the introduction of a dielectric medium, the capacitance becomes 30 µF.
The permittivity of the medium is :
(ε₀=8.85×10^-12 C² N^-1 m^-2)

0.44 x 10^-13C²N^-1m^-2

1.77 x 10^-12C²N^-1m^-2

0.44 x 10^-10C²N^-1m^-2

5.00 C²N^-1m^-2

167 / 180

Dimensions of stress are :

[M L T^-2]

[M L² T^-2]

[M L⁰ T^-2]

[M L^-1 T^-2]

168 / 180

Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is :

3.66×10^-7 rad

1.83×10^-7 rad

7.32×10^-7 rad

6.00×10^-7 rad

169 / 180

A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is 3 π. If instead C is removed from the circuit, the phase difference is again π/3 between current and voltage. The power factor of the circuit is :

zero

0.5

1.0

−1.0

170 / 180

A short electric dipole has a dipole moment of 16×10^-9 C m. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of 60⁰ with the dipole axis is :

50V

200V

400V

zero

171 / 180

An iron rod of susceptibility 599 is subjected to a magnetising field of 1200 A m^-1. The permeability of the material of the rod is : (µ0=4π×10^-7 T m A^-1)

2.4π×10^-4 T m A^-1

8.0×10^-5 T m A^-1

2.4π×10^-5T m A^-1

2.4π×10^-7 T m A^-1

172 / 180

A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is :
(µ0=4π×10^-7 T m A^-1)

6.28×10^-4 T

3.14×10^-4 T

6.28×10^-5 T

3.14×10^-5 T

173 / 180

A charged particle having drift velocity of 7.5×10^-4 m s^-1 in an electric field of 3×10^-10 Vm^-1, has a mobility in m² V^-1 s^-1 of :

2.25×10¹⁵

2.5×10⁶

2.5×10^-6

2.25×10^-15

174 / 180

The quantities of heat required to raise the temperature of two solid copper spheres of radii r₁ and r₂ (r₁=1.5 r₂) through 1 K are in the ratio :

27/8

9/4

3/2

5/3

175 / 180

An electron is accelerated from rest through a potential difference of V volt. If the de Broglie wavelength of the electron is 1.227×10^-2 nm, the potential difference is :

10 V

10² V

10³ V

10⁴ V

176 / 180

Taking into account of the significant figures, what is the value of 9.99 m−0.0099 m ?

9.9801 m

9.98m

9.980m

9.9 m

177 / 180

A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. The height of the tower is : (g=10 m/s²)

360m

340m

320m

300m

178 / 180

A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is :

2.5g

5.0 g

10.0 g

20.0 g

179 / 180

A resistance wire connected in the left gap of a metre bridge balances a 10 Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3 : 2. If the length of the resistance wire is 1.5 m, then the length of 1 Ω of the resistance wire is :

1.0×10^-2 m

1.0×10^-1 m

1.5×10^-1 m

1.5×10^-2 m

180 / 180

For the logic circuit shown, the truth table is :

1

2

3

4

Your score is