Practice Questions

Q47.In which one of the following metal carbonyls, CO forms a bridge between metal atoms? (1) [Co2(CO)8] (2) [Mn2(CO)10] (3) [Os3(CO)12] (4) [Ru3(CO)12]

Q47.Identify the major products A and B respectively in the following set of reactions. (1) (2) (3) (4)

Q47.Phenolic group can be identified by a positive: (1) Phthalein dye test (2) Lucas test (3) Tollen’s test (4) Carbylamine test

Q47.Given below are two statements: Statement - I: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow SN2 mechanism. Statement - II: A secondary alkyl halide when treated with a large excess of ethanol follows SN1 mechanism. In the the light of the above statements, choose the most appropriate from the questions given below: (1) Statement I is true but Statement II is false. (2) Statement I is false but Statement II is true. (3) Both statement I and Statement II are false. (4) Both statement I and Statement II are true.

Q47.The final product A , formed in the following multistep reaction sequence is: (1) (2) (3) (4)

Q47.Identify the major product in the following reaction. (1) (2) (3) (4)

Q47.Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: 𝑝𝐾𝑎 value of phenol is 10 . 0 while that of ethanol is 15 . 9. Reason R: Ethanol is stronger acid than phenol. In the light of the above statements, choose the correct answer from the options given below: (1) A is true but R is false (2) A is false but R is true (3) Both A and R are true and R is the correct (4) Both A and R are true but R is NOT the correct explanation of A explanation of A.

Q47.Which of the following compound can give positive iodoform test when treated with aqueous KOH solution followed by potassium hypoiodite. (1) (2) (3) (4) CH3CH2CH2CHO

Q47.Which one the following compounds will readily react with dilute NaOH ? (1) C2H5OH (2) C6H5OH (3) C6H5CH2OH (4) (CH3)3COH

Q47.In Reimer - Tiemann reaction, phenol is converted into salicylaldehyde through an intermediate. The structure of intermediate is _____ (1) (2) (3) (4)

Q47.Given below are two statement: Statements I : Bromination of phenol in solvent with low polarity such as CHCl3 or CS2 requires Lewis acid catalyst. Statements II : The Lewis acid catalyst polarises the bromine to generate Br+ . 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) Statement I is false but Statement II is true (4) Both Statement I and Statement II are false

Q47.Consider the following complex ions P = [FeF6]3– , Q = [V(H2O) 6]2+ , R = [Fe(H2O)6]2+ The correct order of the complex ions, according to their spin only magnetic moment values (in B.M.) is : JEE Main 2024 (27 Jan Shift 1) JEE Main Previous Year Paper (1) R < Q < P (2) R < P < Q (3) Q < R < P (4) Q < P < R

Q47.Identify A and B in the following sequence of reaction (1) (2) (3) (4)

Q47.Given below are two statements : Statement (I) : Dimethyl glyoxime forms a six membered covalent chelate when treated with NiCl2 solution in presence of NH4OH . Statement (II) : Prussian blue precipitate contains iron both in +2 and +3 oxidation states. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Statement I is false but Statement II is true (2) Both Statement I and Statement II are true (3) Both Statement I and Statement II are false (4) Statement I is true but Statement II is false

Q47.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): SN2 reaction of C6H5CH2Br occurs more readily than the SN2 reaction of CH3CH2Br . Reason (R) : The partially bonded unhybridized p-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring. In the light of the above statements, choose the most appropriate answer from the options given below : (1) (A) is correct but (R) is not correct (2) (A) is not correct but (R) is correct (3) Both (A) and (R) are correct but (R) is not the (4) Both (A) and (R) are correct and (R) is the correct explanation of (A) correct explanation of (A) JEE Main 2024 (09 Apr Shift 1) JEE Main Previous Year Paper

Q47.The number of unpaired d-electrons in [Co(H2O)6]3+ is (1) 2 (2) 1 (3) 0 (4) 4

Q48.CoNH36 3 + and CoF6 3 - are respectively known as: (1) Spin free Complex, Spin paired Complex (2) Spin paired Complex, Spin free Complex (3) Outer orbital Complex, Inner orbital Complex (4) Inner orbital Complex, Spin paired Complex

Q48.In the following sequence of reaction, the major products B and C respectively are : (1) (2) (3) (4)

Q48.During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in NH4OH solution when sodium carbonate extract was first acidified with dil. HNO3 and then AgNO3 solution was added. This indicates presence of : (1) Br− (2) I− (3) Cl− (4) CO32− JEE Main 2024 (06 Apr Shift 2) JEE Main Previous Year Paper

Q48. Consider the above reaction sequence and identify the major product P . (1) Methoxymethane (2) Methanoic acid (3) Methanal (4) Methane

Q48.On passing a gas, ' X ', through Nessler's reagent, a brown precipitate is obtained. The gas ' X ' is (1) H2S (2) CO2 (3) NH3 (4) Cl2

Q48.Which among the following aldehydes is most reactive towards nucleophilic addition reactions? JEE Main 2024 (06 Apr Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q48.Match List-I with List-II. List I (Reaction) List II (Reagent(s)) (A) (I) Na2Cr2O7 / H2SO4 (B) (II) (i) NaOH (ii) CH3Cl (i)NaOH, CHCl3 (C) (III) (ii) NaOH (iii) HCl (i) NaOH (ii) CO2 (D) (IV) (iii) HCl Choose the correct answer from the options given below: (1) (A)-(IV), (B)-(I), (C)-(III), (D)-(II) (2) (A)-(II), (B)-(III), (C)-(I), (D)-(IV) (3) (A)-(II), (B)-(I), (C)-(III), (D)-(IV) (4) (A)-(IV), (B)-(III), (C)-(I), (D)-(II)

Q48.Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Aryl halides cannot be prepared by replacement of hydroxyl group of phenol by halogen atom. Reason R : Phenols react with halogen acids violently. In the light of the above statements, choose the most appropriate from the options given below: (1) Both A and R are true but R is NOT the correct (2) A is false but R is true 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

Q48. C2H5OH−CH3 −CH2 −CH2 −Br + NaOH → Product 'A' Consider the above reactions, identify product B and product C . (1) B = 1-Propanol C = 2-Propanol (2) B = C = 2-Propanol (3) B = 2-Propanol C = 1-Propanol (4) B = C = 1-Propanol