The most suitable vessel for storing concentrated sulphuric acid is A. Copper vessel B. Aluminium vessel C. Glass vessel D. Earthen vessel

The correct answer is C. Glass vessel.

Sulphuric acid is a strong acid that can react with many metals, including copper and aluminium. Glass is a non-metallic material that is not reactive with sulphuric acid. Therefore, a glass vessel is the most suitable vessel for

A copper vessel would react with the sulphuric acid to form copper sulphate and hydrogen gas. This reaction would produce heat, which could cause the vessel to break.

An aluminium vessel would also react with the sulphuric acid to form aluminium sulphate and hydrogen gas. This reaction would also produce heat, which could cause the vessel to break.

An earthen vessel would not be able to withstand the corrosive effects of the sulphuric acid. The acid would react with the clay in the vessel to form a sludge, which would eventually cause the vessel to break.

Therefore, a glass vessel is the most suitable vessel for storing concentrated sulphuric acid.