Nitric acid does not react with which of the following metals?

(a) A dilute acid B does not normally give hydrogen when reacted with metals but does give a gas when reacts with copper. Identify B. Write equation with copper.

(b) Complete the table :

$\begin{array}{cccc}\text{Name of Process}& \text{Inputs}& \text{Equation}& \text{Output}\\ & \text{Ammonia}& & \text{Nitric acid}\\ & \text{+Air}& & \end{array}$

(c) What is the property of nitric acid which allows it to react with copper.

Which of the following gas is released when copper reacts with dil. nitric acid?