Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Give the structure of the product you would expect when the following alcohol reacts with SOCl₂.

Butan-1-ol

Give the structure of the product you would expect when the following alcohol reacts with SOCl₂.

2-Methylbutan-2-ol

Compare acidity of phenol with that of ethanol.

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.

Complete the following reactions:

State Kohlrausch Law.

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

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

The conductivity of 0.001 mol L-1 solution of CH₃COOH is 3.905× 10-5 S cm-1. Calculate its molar conductivity and degree of dissociation (α) Given λ°(H⁺)= 349.6 S cm² mol-1 and λ°(CH₃COO)= 40.9S cm²mol^-1.

Give reasons for the following:

o-nitrophenol is more acidic than o-methoxyphenol.

Draw the structures of the following: H₄P₂O₇ (Pyrophosphoric acid)

Write the mechanism of the following reaction:

Write the chemical equation for the reaction involved in Cannizzaro reaction.

What is the basicity of H₃PO₄?

Define limiting molar conductivity.

Why conductivity of an electrolyte solution decreases with the decrease in concentration ?

Write the mechanism of the following reaction :

The conductivity of 0.20 mol L⁻¹ solution of KCl is 2.48 × 10⁻² S cm⁻¹. Calculate its molar conductivity and degree of dissociation (α). Given λ⁰ (K⁺) = 73.5 S cm² mol⁻¹ and λ⁰ (C1⁻) = 76.5 S cm² mol⁻¹.