Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

Complete the following reactions:

Write the major products(s) in the following:

Define electrochemical cell

Why does the cell potential of mercury cell remain constant throughout its life?

On the basis of crystal field theory, write the electronic configuration for d⁴ ion if Δ₀ > P.

From the given cells:

Lead storage cell, Mercury cell, Fuel cell and Dry cell

Answer the following:

(i) Which cell is used in hearing aids?

(ii) Which cell was used in Apollo Space Programme?

(iii) Which cell is used in automobiles and inverters?

(iv) Which cell does not have long life?

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

On the basis of crystal field theory, write the electronic configuration for d⁴ ion if ∆₀ < P.

Amino acids show amphoteric behaviour. Why?

Define the following term

Schottky defect

What type of battery is mercury cell? Why is it more advantageous than dry cell?

What type of non-stoichiometric point defect is responsible for the pink colour of LiCl ?

What type of stoichiometric defect is shown by NaCl ?

Name the type of cell which was used in Apollo space programme for providing electrical power.

Write the chemical equations to illustrate the following name reaction: 

Cannizzaro’s reaction

Which stoichiometric defect does not change the density of the crystal?

Define terms: Fuel cell

Which stoichiometric defect decreases the density of the crystal?

Define the following terms: Secondary batteries

Define the following term:

Essential amino acids