Revisal Problems (Past 13 Year) JEE Main (Alkyl Halides) - JEE MCQ

The reaction is fastest with 3° halides

The rate of reaction increases when the solvent is changed from acetone to ethanol

The identity of the leaving group does not affect the reaction rate

Both (a) and (b)

II, IV, I, III

I, III, IV, II 

II, I, IV, II

IV, II, I, III

Both (b) and (c)

carbanion

carbine

free radical

carbocation

C₆H₅CI

(C₆H₅)₃CCI

C₆H₅CH₂CI

1-chlorobutane < 2-chlorobutane

4-chloro-1 -butene < 2-chlorobutane

2-iodobutane < 2-bromobutane

chloroethane < penta deuterated chloroethane

When X = Cl, 1 -hexene will be favoured over cis and trans 2-hexene

When X = Br, cis and frans-2-hexene will be favoured over 1 -hexene

When X = F, the product distribution will be same as for X = Cl

When X = Cl, ionisation takes place followed by rearrangements

1-chloropentane

2-chloropentane

2-chloro-2-methyl butane

2, 2-dimethy!-1-chloropropane

methylcyclohexene

2-methylcyclohexene

3-methylcyclohexene

4-methylcyclohexene

Nitrogen is strongly solvated in hydroxylic solvents, it will be less reactive

Carbon is more reactive in polar aprotic solvents, normally used for these S_N2 reactions

Carbon atoms are more basic than nitrogen

The lone pair of electrons on C is in sp hybrid orbital

iodide > bromide > chloride > > fluoride

iodide > bromide > chloride > fluoride

iodide < bromide < chloride < fluoride

iodide < bromide > chloride > fluoride

The rate of reaction increases on increasing strength of the nucleophile

The reaction is faster in polar aprotic solvents

The rate of reaction increases as the leaving group ability increases

All statements are true

I > II > III

I > III > II

II > III > I

II > I > III

II < III < I < IV

IV < III < II < I

Ill < II < IV < I

I < IV < II < III

In both case, C—N bond is mainly formed

In no case, the major product involves formation of C—N bond

With NaSCN, mainly C—S bond is formed while with NaOCN, mainly C—N bond is formed

With NaSCN, mainly C—N bond is formed while with, mainly C—O bond is formed

Energy of reactants is raised, and transition state energy remains about the same

Energies of reagents and transition state are lowered .by about the same amount

Energy of reactants are lowered slightly, and energy of transition state structure are lowered significantly more

Energy of reactants is lowered significantly, and energy of transition state structure is lowered significantly less

I > II > III > IV

IV > III > I > II

Ill > II > I > IV

II > III > IV > I

gets oxidised

gets hydrolysed

gets decomposed to give hydrocarbons

remains unaffected

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect

Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I

Statement I is correct but Statement II is incorrect

Statement II is correct but Statement I is incorrect