PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH(Br)CH2CH3 + NaOH ->[water]}\]

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH2Br + KCN ->[aq.ethanol]}\]

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH2CH2OH + SOCl2 ->}\]

Write the mechanism of the following reaction:

\[\ce{{n}BuBr + KCN ->[EtOH-H2O] {n}BuCN}\]

Arrange the compounds of the following set in order of reactivity towards S_N2 displacement:

2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane

Arrange the compounds of the following set in order of reactivity towards S_N2 displacement:

1-Bromo-3-methylbutane, 2-Bromo-2-methylbutane, 2-Bromo-3-methylbutane

Arrange the compounds of the following set in order of reactivity towards S_N2 displacement:

1-Bromobutane, 1-Bromo-2, 2-dimethylpropane, 1-Bromo-2-methylbutane, 1-Bromo-3-methylbutane

Out of C₆H₅CH₂Cl and C₆H₅CHClC₆H₅, which is more easily hydrolysed by aqueous KOH.

The treatment of alkyl chlorides with aqueous KOH leads to the formation of alcohols but in the presence of alcoholic KOH, alkenes are major products. Explain.

What happens when chlorobenzene is subjected to hydrolysis?

What happens when ethyl chloride is treated with aqueous KOH?

What happens when methyl chloride is treated with KCN?

How the following conversion can be carried out?

Ethyl chloride to propanoic acid.

C–Cl bond length in chlorobenzene is shorter than C–Cl bond length in CH₃–Cl.

S_N1 reactions are accompanied by racemization in optically active alkyl halides.

Given reasons: S_N1 reactions are accompanied by racemization in optically active alkyl halides.

What type of azeotrope is formed by positive deviation from Raoult’s law?

Give the structure of the product you would expect when the following alcohol reacts with HCl–ZnCl₂.

2-Methylbutan-2-ol

Give the structure of the product you would expect when the following alcohol reacts with HBr.

Butan-1-ol

Give the structure of the product you would expect when the following alcohol reacts with HBr.

2-Methylbutan-2-ol