What happens when mixture of `NH_(3)` and air is passed over heated platinum gauze ?

What happens when a mixture of acetylene and hydrogen is passed over heated nickel at 573 K?

What happens when a mixture of acetylene and hydrogen is passed over heated Lindlar's catalyst?

What happens when a mixture of (NH_(4))_(2)SO_(4) and NaNO_(3) is heated ?

What happens when A mixture of ethene and steam is passed over phosphoric acid on silica at 300^@C and 70 atm.

What happens when vapours isopropyl alcohol are passed over heated copper?

What happens when mixture of CO_2 and NH_3 gas is passed through a slurry of powdered gypsum in water?