identify the species from following that exhibits no bond resonance.

When a mixture of vapours of phenol and hydrogen is passed over nickel catalyst at 433 K, the product obtained is

A metal has $$\mathrm{BCC}$$ structure with edge length of unit cell $$400 \mathrm{~pm}$$. Density or metal is $$4 \mathrm{~g} \mathrm{~cm}^{-3}$$. What is molar mass of metal?

Which from the following is the correct relationship between standard Gibbs energy change and standard cell potential?