Practice Questions

Q37.An unsaturated hydrocarbon X on ozonolysis gives A. Compound A when warmed with ammoniacal silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon X is : JEE Main 2021 (16 Mar Shift 2) JEE Main Previous Year Paper (1) (2) (3) HC ≡C −CH2 −CH3 (4) CH3 −C ≡C −CH3

Q37.Match List I with List II : List-I List-II Properties Elements (a) Li (i) Poor water solubility of I− salt (b) Na (ii) Most abundant element in cell fluid (c) K (iii) Bicarbonate salt used in fire extinguisher (d) Cs (iv) Carbonate salt decomposes easily on heating Choose the correct answer from the options given below: (1) (a) −(iv), (b) −(iii), (c) −(ii), (d) −(i) (2) (a) −(i), (b) −(iii), (c) −(ii), (d) −(iv) (3) (a) −(iv), (b) −(ii), (c) −(iii), (d) −(i) (4) (a) −(i), (b) −(ii), (c) −(iii), (d) −(iv)

Q37.Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are : (1) A and B only (2) B and C only (3) C only (4) B only

Q37.In the following reaction, the reason why meta-nitro product also formed is: (1) Formation of anilinium ion (2) -NH2 group is highly meta-directive (3) -NO2 substitution always takes place at meta- (4) low temperature position

Q37. BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively as: (1) A < 5, B > 17 (2) A > 50, B < 27 (3) A > 15, B > 47 (4) A > 25, B < 17

Q37.In CH21 = C2 = CH3 − CH34 molecule, the hybridization of carbon 1, 2, 3 and 4 respectively, are : (1) sp2, sp3, sp2, sp3 (2) sp2, sp, sp2, sp3 (3) sp2, sp2, sp2, sp3 (4) sp3, sp, sp3, sp3

Q37. consider the above reaction, and choose the correct statement: (1) The reaction is not possible in acidic medium (2) Both compounds A and B are formed equally (3) Compound A will be the major product (4) Compound B will be the major product JEE Main 2021 (27 Jul Shift 2) JEE Main Previous Year Paper

Q37.Metallic sodium does not react normally with: (1) gaseous ammonia (2) But- 2 -yne (3) Ethyne (4) tert-butyl alcohol

Q37.The major product of the following reaction is : (1) (2) (3) (4)

Q37.Identify correct A, B and C in the reaction sequence given below : (1) (2) (3) (4)

Q37.Which one of the following compounds is not aromatic? (1) (2) (3) (4)

Q37.Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound A is: JEE Main 2021 (26 Feb Shift 1) JEE Main Previous Year Paper (1) PbO (2) Pb3 O4 (3) PbO2 (4) PbSO4

Q37.Mesityl oxide is a common name of: (1) 2, 4 -Dimethylpentan- 3 -one (2) 3-Methylcyclohexanecarbaldehyde (3) 2-Methylcyclohexanone (4) 4-Methylpent- 3-en- 2-one

Q37.In chromatography technique, the purification of a compound is independent of: (1) Mobility or flow of solvent system (2) Solubility of the compound (3) Length of the column or TLC Plate (4) Physical state of the pure compound

Q37. The correct order of stability of given carbocation is: (1) A > C > B > D (2) D > B > C > A (3) D > B > A > C (4) C > A > D > B

Q37.Which of the following molecules does not show stereo isomerism ? JEE Main 2021 (22 Jul Shift 1) JEE Main Previous Year Paper (1) 3, 4 -Dimethylhex- 3 -ene (2) 3 -Methylhex- 1 -ene (3) 3 -Ethylhex- 3 -ene (4) 4 -Methylhex- 1 -ene

Q37.What is the correct sequence of reagents used for converting nitrobenzene into m -dibromobenzene? (1) Sn / HCl KBr Br2 H+ (2) Br2 / Fe Sn / HCl NaNO2 / HCl CuBr / HBr−−−−−−→ / → / →/ → → / → / → / → (3) NaNO2 HCl KBr H+ (4) Sn / HCl Br2 NaNO2 NaBr−−−−−−→ / → / → / → → / →/ → / →

Q37.Among the following compounds I −IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. HNO3 (iii) AgNO3? (1) III (2) II (3) I (4) IV

Q37.Which one of the following chemical agent is not being used for dry-cleaning of clothes? (1) H2O2 (2) CCl4 (3) Liquid CO2 (4) Cl2C = CCl2

Q37.The satements that are TRUE: (A) Methane leads to both global warming and photochemical smog (B) Methane is generated from paddy fields (C) Methane is a stronger global warming gas than CO2 (D) Methane is a part of reducing smog Choose the most appropriate answer from the options given below: (1) (A), (B), (C) only (2) (A) and (B) only (3) (B), (C), (D) only (4) (A), (B), (D) only

Q37.In the following molecules, Hybridisation of carbon a, b and c respectively are : JEE Main 2021 (18 Mar Shift 2) JEE Main Previous Year Paper (1) sp3, sp, sp (2) sp3, sp2, sp (3) sp3, sp2, sp2 (4) sp3, sp, sp2

Q38.The green house gas/es is (are): (A) Carbon dioxide (B) Oxygen (C) Water vapour (D) Methane Choose the most appropriate answer from the options given below: (1) (A) and (C) only (2) (A) only (3) (A), (C) and (D) only (4) (A) and (B) only

Q38.Tyndall effect is more effectively shown by: (1) lyophilic colloid (2) suspension (3) lyophobic colloid (4) true solution

Q38.For the following sequence of reactions, the correct products are : JEE Main 2021 (31 Aug Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q38.The conversion of hydroxyapatite occurs due to presence of F− ions in water. The correct formula of hydroxyapatite is: (1) [Ca3 (PO4)2 ⋅CaF2] (2) [3 Ca3 (PO4)2 ⋅Ca(OH)2] (3) [3 Ca3 (PO4)2 ⋅CaF2] (4) [3 Ca(OH)2 ⋅CaF2]