Write the IUPAC name of the given compound:

On adding NaOH to ammonium sulphate, a colourless gas with pungent odour is evolved which forms a blue coloured complex with Identify the gas.

What type of magnetism is shown by a substance if magnetic moments of domains are arranged in same direction?

Write the main reason for the stability of colloidal sols.

From the given cells:

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

Answer the following:

A. Which cell is used in hearing aids?

B. Which cell was used in Apollo Space Programmed?

C. Which cell is used in automobiles and inverters?

D. Which cell does not have long life?