Practice Questions

Q44. Consider the above reaction sequence, Product "A" and Product "B" formed respectively are: JEE Main 2021 (25 Jul Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q44.The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO4 ⋅5H2O, respectively, are (1) 6 and 4 (2) 4 and 1 (3) 6 and 5 (4) 5 and 1

Q44.What is the spin-only magnetic moment value (B.M.) of a divalent metal ion with atomic number 25, in its aqueous solution? JEE Main 2021 (17 Mar Shift 1) JEE Main Previous Year Paper (1) 5. 92 (2) 5. 0 (3) zero (4) 5. 26

Q45.In which of the following pairs, the outermost electronic configuration will be the same? (1) Cr+ and Mn2+ (2) Ni2+ and Cu+ (3) Fe2+ and Co+ (4) V2+ and Cr+

Q45.Match List −I with List −II : JEE Main 2021 (18 Mar Shift 1) JEE Main Previous Year Paper List −I List −II (Chemicals) (Use / Preparation / Constituent) (a) Alcoholic potassium hydroxide (i) Electrodes in batteries (b) Pd / BaSO4 (ii) Obtained by addition reaction (c) BHC (Benzene hexachloride) (iii) Used for β−elimination reaction (d) Polyacetylene (iv) Lindlar's catalyst Choose the most appropriate match (1) a −ii, b −i, c −iv, d −iii (2) a −iii, b −iv, c −ii, d −i (3) a −iii, b −i, c −iv, d −ii (4) a −ii, b −iv, c −i, d −iii

Q45.What is the major product "P" of the following reaction ? (1) (2) (3) (4)

Q45.Which one of the following complexes is violet in colour? (1) Fe4 [Fe(CN)6]3 ⋅H2O (2) [Fe(CN)5 NOS]4− (3) [Fe(SCN)6]4− (4) [Fe(CN)6]4−

Q45.For the given reaction: What is A ? (1) (2) (3) (4)

Q45. Which of the following reagent is suitable for the preparation of the product in the above reaction? (1) Red P + Cl2 (2) NaBH4 (3) ⊝ ⊕ (4) Ni /H2 NH2 −NH2 /C2H5 ONa

Q45.The structure of the starting compound P used in the reaction given below is: JEE Main 2021 (27 Aug Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q45.Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (R) : Gabriel phthalimide synthesis cannot be used to prepare aromatic primary amines. Reason : Aryl halides do not undergo nucleophilic substitution reaction. In the light of the above statements, choose the correct answer from the options given below: (1) Both (A) and (R) true but (R) is not the correct (2) (A) is false but ( R) is true. explanation of (A). (3) Both (A) and (R) true and (R) is correct (4) (A) is true but (R) is false. explanation of (A).

Q45.Which of the following is Lindlar catalyst? JEE Main 2021 (16 Mar Shift 1) JEE Main Previous Year Paper (1) Zinc chloride and HCl (2) Cold dilute solution of KMnO4 (3) Sodium and Liquid NH3 (4) Partially deactivated palladised charcoal

Q45.The major product (P) in the following reaction is: (1) (2) (3) (4)

Q45.Match List-I with List-II : List-I List-II a [Co (NH3)6][Cr(CN)6] i Linkage isomerism b [Co (NH3)3(NO2)3] ii Solvate isomerism c [Cr (H2O)6] Cl3 iii Co-ordination isomerism d cis −[CrCl2(ox)2]3− iv Optical isomerism Choose the correct answer from the options given below: (1) (a) −(iii), (b) −(i), (c) −(ii), (d) −(iv) (2) (a )-( iv ) , (b) −(ii), (c) −(iii), (d) −(i) (3) (a )-( ii ), ( b )-( i ), ( c )-( iii ), ( d )-( iv) (4) (a) −(i), (b) −(ii), (c) −(iii), (d) −(iv)

Q45.In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment? (i) [FeF6]3− (ii) [Co (NH3)6]3+ (iii) [NiCl4]2− (iv) [Cu (NH3)4]2+ (1) (ii) > (i) > (iii) > (iv) (2) (iii) > (iv) > (ii) > (i) (3) (i) > (iii) > (iv) > (ii) (4) (ii) > (iii) > (i) > (iv) JEE Main 2021 (25 Feb Shift 2) JEE Main Previous Year Paper

Q45.What is A in the following reaction? (1) (2) (3) (4)

Q45.The set having ions which are coloured and paramagnetic both is - (1) Cu2+, Cr3+, Sc+ (2) Cu2+, Zn2+, Mn4+ (3) Sc3+, V5+, Ti4+ (4) Ni2+, Mn7+, Hg2+

Q45.Ammonolysis of Alkyl halides followed by the treatment with NaOH solution can be used to prepare primary, secondary and tertiary amines. The purpose of NaOH in the reaction is. (1) to remove basic impurities (2) to activate NH3 used in the reaction (3) to remove acidic impurities (4) to increase the reactivity of alkyl halide.

Q45.What is the final product (major) 'A' in the given reaction? Major product among the following is? JEE Main 2021 (24 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q45. The above reaction requires which of the following reaction conditions? (1) 573 K, Cu, 300 atm (2) 623 K, Cu, 300 atm (3) 573 K, 300 atm (4) 623 K, 300 atm

Q45.Identify A in the given chemical reaction. JEE Main 2021 (26 Feb Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q45.In the given reaction 3−Bromo −2, 2−dimethyl butane → ′A′ Product A is: (Major Product) (1) 2−Ethoxy −3, 3−dimethyl butane (2) 1−Ethoxy −3, 3 −dimethyl butane (3) 2−Ethoxy −2, 3−dimethyl butane (4) 2−Hydroxy −3, 3−dimethyl butane JEE Main 2021 (20 Jul Shift 1) JEE Main Previous Year Paper

Q45.Which one of the following reactions will not yield propanoic acid? (1) CH3 CH2 CH2 Br + Mg, CO2 dry ether /H3O+ (2) CH3 CH2 CH3 + KMnO4(Heat), OH−/H3O+ (3) CH3 CH2 CCl3 + OH−/H3O+ (4) CH3 CH2 COCH3 + OI−/H3O+

Q45.The major product of the following reaction is : (1) (2) (3) (4)

Q45.Main Products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are: (1) (2) and CH3 I and CH3 OH (3) (4) and CH3 OH and CH3 I