Mode : Exam Mode / Duration : 45 Minutes / Right answer : +4 / Wrong Answer : -1 / Unlimited attempts 1 123456789101112131415161718192021222324252627282930313233343536373839404142434445 Chemistry – NEET-2020 – Exam Mode Chemistry – NEET-2020 – Exam Mode This quiz is in the format of Exam, has 45 questions. Results are displayed at end. Total time duration : 45 Minutes Points to remember Right answer : +4 Wrong Answer : -1 Number of attempts : Unlimited 1 / 45 Identify a molecule which does not exist. He2 Li2 C2 O2 2 / 45 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 3 / 45 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 4 / 45 Hydrolysis of sucrose is given by the following reaction. Sucrose+H2O⇌Glucose+Fructose If the equilibrium constant (KC ) is 2×1013 at 300 K, the value of ∆rGs 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) 5 / 45 Identify compound X in the following sequence of reactions Options 1 2 3 4 6 / 45 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) 7 / 45 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 8 / 45 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 9 / 45 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 10 / 45 Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give : Isopropyl alcohol Sec. butyl alcohol Tert. butyl alcohol Isobutyl alcohol 11 / 45 Which of the following oxoacid of sulphur has −O−O− linkage ? H2SO3 , sulphurous acid H2SO4, sulphuric acid H2S2O8 , peroxodisulphuric acid H2S2O7 , pyrosulphuric acid 12 / 45 Which of the following amine will give the carbylamine test 1 2 3 4 13 / 45 The calculated spin only magnetic moment of Cr2+ ion is 3.87 BM 4.90 BM 5.92 BM 2.84 BM 14 / 45 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 15 / 45 The freezing point depression constant (Kf) 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 16 / 45 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 17 / 45 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 18 / 45 Paper chromatography is an example of : Adsorption chromatography Partition chromatography Thin layer chromatography Column chromatography 19 / 45 An increase in the concentration of the reactants of a reaction leads to change in : Activation energy Heat of reaction Threshold energy Collision frequency 20 / 45 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 21 / 45 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. 22 / 45 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 23 / 45 Which of the following is a cationic detergent ? Sodium lauryl sulphate Sodium stearate Cetyltrimethyl ammonium bromide Sodium dodecylbenzene sulphonate 24 / 45 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) 25 / 45 The mixture which shows positive deviation from Raoult’s law is : Ethanol+Acetone Benzene+Toluene Acetone+Chloroform Chloroethane+Bromoethane 26 / 45 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– 27 / 45 Which of the following is a basic amino acid ? Serine Alanine Tyrosine Lysine 28 / 45 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 29 / 45 Which of the following is a natural polymer ? cis-1,4-polyisoprene poly (Butadiene-styrene) polybutadiene poly (Butadiene-acrylonitrile 30 / 45 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 31 / 45 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 32 / 45 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 33 / 45 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] 34 / 45 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 35 / 45 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 36 / 45 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 CrO42- and Cr2O72- are not same. 37 / 45 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 38 / 45 Measuring Zeta potential is useful in determining which property of colloidal solution ? Viscosity Solubility Stability of the colloidal particles Size of the colloidal particles 39 / 45 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 40 / 45 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) 41 / 45 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) 42 / 45 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 43 / 45 An alkene on ozonolysis gives methanal as one of the product. Its structure is 1)2) 3)4) 1 2 3 4 44 / 45 Which of the following alkane cannot be made in good yield by Wurtz reaction ? n-Hexane 2,3-Dimethylbutane n-Heptane n-Butane 45 / 45 Anisole on cleavage with HI gives : 1)2)3)4) 1 2 3 4 Your score is Restart quiz Was this helpful? YesNo 0 / 0