Ammonia is formed by the reaction of gases …………………

The reaction $Zn+H_{2}S{O}_4⟶ZnS{O}_4+H_{2}Zn+H\_2SO\_4\backslash longrightarrow\; ZnSO\_4+H\_2$ represents ……..…. reaction.

A solution of potassium iodide reacts with lead nitrate to give …………

A solution of sodium carbonate reacts with $Ca(OH{)}_{2}Ca(OH)\_2$ to give ……………

Which reaction is a reversible reaction?

Due to which of the following enzymes, the surface of the fruit changes the colour on cutting?

Which of the following vitamins prevents the spoilage of food?

To prevent which of the following reactions nitrogen gas is filled in chips flush bags?

Which of the following is formed, when magnesium burns in air?

$CuO+H_2⟶Cu+H_{2}O\mathrm{.}CuO+H\_2\backslash longrightarrow\; Cu+H\_2O.$ In this reaction, which one is reduced?