Mn₂(CO)₁₀ is an organometallic compound due to the presence of -

The volume of gas A is twice than that of gas B. The compressibility factor of gas A is thrice than that of gas B at same temperature. The pressures of the gases for equal number of moles are -

The major product of the following reaction is –

In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of -