Choose the correct option(s) from the following.

The cyanide process of gold extraction involves leaching out gold from its ore with CN^$$-$$ in the presence of Q in water to form R. Subsequently, R is treated with T to obtain Au and Z. Choose the correct option(s).

Which of the following reactions produce(s) propane as a major product?

The decomposition reaction

$$2{N_2}{O_5}(g)\buildrel \Delta \over \longrightarrow 2{N_2}{O_4}(g) + {O_2}(g)$$

is started in a closed cylinder under isothermal isochoric condition at an initial pressure of 1 atm. After Y $$ \times $$ 10³ s, the pressure inside the cylinder is found to be 1.45 atm. If the rate constant of the reaction is 5 $$ \times $$ 10^-4s^-1, assuming ideal gas behaviour, the value of Y is ...............