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

Predict all the alkenes that would be formed by dehydrohalogenation of the following halide with sodium ethoxide in ethanol and identify the major alkene:

2, 2, 3-Trimethyl-3-bromopentane

How will you bring about the following conversion?

But-1-ene to but-2-ene

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

\[\ce{(CH3)3CBr + KOH ->[ethanol][heat]}\]

How the following conversion can be carried out?

1-Bromopropane to 2-bromopropane

How the following conversion can be carried out?

2-Chloropropane to 1-propanol

How the following conversion can be carried out?

2-Bromopropane to 1-bromopropane

What happens when PCl₅ is heated?

Write a balanced equation for the hydrolytic reaction of PCl₅ in heavy water.

Can PCl₅ act as an oxidising as well as a reducing agent? Justify.

Give an example of the reaction in the following case.

Oxime

Give an example of the reaction in the following case.

Imine

Define “Molar conductivity”.

State Kohlrausch’s law of independent migration of ions.

The conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm⁻¹. Calculate its molar conductivity.

How will you bring about the following conversions?

Propanone to propane

Give simple chemical tests to distinguish between the following pairs of compounds:  Benzoic acid and Phenol

State Kohlrausch Law.

Write the final product(s) in each of the following reactions:

Write the structural difference between starch and cellulose.

What is the role of sulphur in the vulcanisation of rubber?