Practice Questions

Q41.The principle of column chromatography is: (1) Differential adsorption of the substances on the (2) Differential absorption of the substances on the solid phase. solid phase. (3) Gravitational force. (4) Capillary action

Q41.The increasing order of nucleophilicity of the following nucleophiles is; (1) ( i ) < ( iv ) < ( iii ) < ( ii ) (2) ( ii ) < ( iii ) < ( iv ) < ( i ) (3) iv < i < iii < ii (4) ( ii ) < ( iii ) < ( i ) < ( iv )

Q41.Which of the following compounds will produce a precipitate with AgNO3? (1) (2) (3) (4)

Q41.Which one of the following is likely to give a precipitate with AgNO3 solution? (1) CH2 = CH −Cl (2) (CH3)3CCl (3) CCl4 (4) CHCl3

Q41.Molal depression constant for a solvent is 4.0 K kg mol−1. The depression in the freezing point of the solvent for 0.03 mol kg−1 solution of K2SO4 is: (Assume complete dissociation of the electrolyte) (1) 0.36 K (2) 0.24 K (3) 0.18 K (4) 0.12 K

Q41.The major product of the following reaction is JEE Main 2019 (09 Apr Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q41.The correct match between items I and II is : (1) (A) →(S); (B) →(R); (C) →(P) (2) (A) →(Q); (B) →(R); (C) →(S) (3) (A) → (R); (B) → (P); (C) → (S) (4) (A) →(Q); (B) →(R); (C) →(P)

Q41.The major product of the following reaction is: (1) (2) (3) (4)

Q41.The increasing order of the pKa values of the following compounds is: (1) B < C < A < D (2) D < A < C < B (3) B < C < D < A (4) C < B < A < D

Q41.The IUPAC name of the following compound is: (1) 4 - Methyl - 3 - hydroxypntanoic(2) 4,4 - Dimethylacid - 3 - hydroxybutanoic(3) 2 - Methyl -acid3 - hydroxypentan(4) 3 - Hydroxy- 5 - oic- acid4 - methylpentanoic

Q41.Among the following four aromatic compounds, which one will have the lowest melting point? (1) (2) (3) (4)

Q41.At 100oC, copper (Cu) has FCC unit cell structure with cell edge length of x Å . What is the approximate density of Cu (in g cm−3 ) at this temperature? [Atomic Mass of Cu = 63.55 u] (1) 105 (2) 205 x3 x3 (3) 422 (4) 211 x3 x3

Q41.Polysubstitution is a major drawback in: (1) Reimer Tiemann reaction (2) Friedel Craft's alkylation (3) Acetylation of aniline (4) Friedel Craft's acylation

Q42.The increasing order of the pKb of the following compund is: ( A ) ( B ) ( C ) ( D ) (1) ( B ) < ( D ) < ( C ) < ( A ) (2) ( B ) < ( D ) < ( A ) < ( C ) (3) ( C ) < ( A ) < ( D ) < ( B ) (4) ( A ) < ( C ) < ( D ) < ( B )

Q42.The amount of sugar (C12H22O11) required to prepare 2L of its 0 .1 M aqueous solution is: (1) 17 .1 g (2) 136 .8 g (3) 68 .4 g (4) 34 .2 g

Q42.Which amongst the following is the strongest acid? (1) CHCN3 (2) CHI3 (3) CHBr3 (4) CHCl3

Q42.A solution containing 62 g ethylene glycol in 250 g water is cooled to −10oC . If Kf for water is 1.86 K kg mol−1 , the amount of water (in g ) separated as ice is: (1) 48 (2) 64 (3) 16 (4) 32

Q42.The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reactions is: JEE Main 2019 (10 Apr Shift 1) JEE Main Previous Year Paper (1) II < I < III (2) III < II < I (3) III < I < II (4) I < III < II

Q42.Taj Mahal is being slowly disfigured and discoloured. This is primarily due to (1) Global warming (2) Acid rain (3) Water pollution (4) Soil pollution

Q42.In the following skew conformation of ethane, H' −C −C −H′′ dihedral angle is: (1) 58o (2) 120o (3) 149o (4) 151o

Q42.A solution of Ni(NO3)2 is electrolyzed between platinum electrode 0.1 Faraday electricity. How many mole of Ni will be deposited at the cathode? (1) 0.10 (2) 0.15 (3) 0.05 (4) 0.20

Q42.Which one of the following alkenes when treated with HCl yields majorly an anti Markovnikov product? (1) CH3O - CH = CH2 (2) Cl - CH = CH2 (3) H2N - CH = CH2 (4) F3C - CH = CH2

Q42.The major product of the f following reaction is: JEE Main 2019 (08 Apr Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q42.An organic compound is estimated through Dumas method and was found to evolve 6 moles of CO2, 4 moles of H2O and 1 mole of nitrogen gas. The formula of the compound is: (1) C12H8 N (2) C12H8 N2 (3) C6H8 N2 (4) C6H8 N

Q42.The major product of the following reaction is: JEE Main 2019 (12 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)