Practice Questions

Q44.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis. Reason (R): Reaction of bromobenzene with sodium ethoxide yields ethyl phenyl ether. In the light of the above statements, choose the most appropriate answer from the options given below. (1) Both (A) and (R) are correct but (R) is NOT the (2) (A) is correct but (R) is not correct correct explanation of (A) (3) (A) is not correct but (R) is correct (4) Both (A) and (R) are correct and (R) is the correct explanation of (A)

Q44.Spin only magnetic moment in BM of FeCO4C2O4 + is : (1) 5 . 92 (2) 1 (3) 0 (4) 1 . 73 JEE Main 2021 (31 Aug Shift 2) JEE Main Previous Year Paper

Q44.Given below are two statements : Statement I: [Mn(CN)6]3−, [Fe(CN)6]3− and [Co (C2O4)3]3− are d2 sp3 hybridised. Statement II : [MnCl6]3− and [FeF6]3− are paramagnetic and have 4 and 5 unpaired electrons, respectively. In the light of the above statements, choose the correct answer from the options given below: (1) Statement I is correct but statement II is false (2) Both statement I and statement II are false (3) Statement I is incorrect but statement II is true (4) Both statement I and statement II are are true

Q44.The structure of product C, formed by the following sequence of reactions is : Benzene KCN −−CH3 COOH + SOCl2 ⟶A → ⟶B →⟶C AlCl3 −OH (1) (2) (3) (4)

Q44.For the given reaction: What is A ? JEE Main 2021 (26 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4) CH3 CH2 CH2 NH2

Q44.Given below are two statements: Statement I : CeO2 can be used for oxidation of aldehydes and ketones. Statement II : Aqueous solution of EuSO4 is a strong reducing agent. In the light of the above statements, choose the correct answer from the options given below: (1) Both Statement I and Statement II are true (2) Statement I is true but Statement II is false (3) Both Statement I and Statement II are false (4) Statement I is false but Statement II is true

Q44.Spin only magnetic moment of an octahedral complex of Fe2+ in the presence of a strong field ligand in BM is: (1) 4. 89 (2) 2. 82 (3) 0 (4) 3. 46

Q44. What is the major product formed by HI on reaction with (1) (2) (3) (4)

Q44.Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value. Complexes: [CoF6]3− , [Co (H2O)6]2+ , [Co (NH3)6]3+ and [Co(en)3]3+ A B C D Choose the correct option : (1) B < C < D < A (2) B < A < C < D (3) A < B < C < D (4) C < D < B < A

Q44.The type of hybridisation and magnetic property of the complex [MnCl6]3−, respectively, are: (1) sp3 d2 and diamagnetic (2) d2 sp3 and diamagnetic (3) d2 sp3 and paramagnetic (4) sp3 d2 and paramagnetic JEE Main 2021 (27 Jul Shift 1) JEE Main Previous Year Paper

Q44.Which one of the following when dissolved in water gives coloured solution in nitrogen atmosphere? (1) Cu2 Cl2 (2) ZnCl2 (3) CuCl2 (4) AgCl

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.Given below are two statements : Statement I : Ethyl pent- 4-yn-oate on reaction with CH3 MgBr gives a 3°-alcohol. JEE Main 2021 (27 Aug Shift 2) JEE Main Previous Year Paper Statement II : In this reaction one mole of ethyl pent- 4 -yn-oate utilizes two moles of CH3 MgBr. In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are false (2) Statement I is true but Statement II is false (3) Statement I is false but Statement II is true (4) Both Statement I and Statement II are true

Q44.Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Size of Bk3+ ion is less than Np3+ ion. Reason R : The above is a consequence of the lanthanide contraction. In the light of the above statements, choose the correct answer from the options given below : (1) A is false but R is true (2) Both A and R are true but R is not the correct explanation of A (3) A is true but R is false (4) Both A and R are true and R is the correct explanation of A

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 calculated magnetic moments (spin only value) for species [FeCl4]2−, [Co (C2O4)3]3− and MnO2−4 respectively are: (1) 4. 90, 0 and 1. 73 BM (2) 4. 90, 0 and 2. 83 BM (3) 5. 82, 0 and 0 BM (4) 5. 92, 4. 90 and 0 BM

Q44. Consider the given reaction, the product 'X' is: (1) (2) (3) (4)

Q44.Reaction of Grignard reagent, C2H5 MgBr with C8H8O followed by hydrolysis gives compound A , which reacts instantly with Lucas reagent to give compound B(C10H13 Cl). The Compound B is: (1) (2) (3) (4)

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.The correct order of reactivity of the given chlorides with acetate in acetic acid is : (1) (2) (3) (4) JEE Main 2021 (31 Aug Shift 1) 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.The major product (P) in the following reaction is: (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.Experimentally reducing a functional group cannot be done by which one of the following reagents ? (1) Zn / H2O (2) Pt - C / H2 (3) Pd - C / H2 (4) Na / H2