The product obtained as a result of a reaction of nitrogen with $CaC_2$ is

Which of the following statements is false?

Which of the following statements is not correct?

Two alkali halide salts,$ACl$ and $BCl$,gave crimson red and violet colors in their flame tests,respectively. $A$ and $B$ are respectively:

Compound $A$ is prepared by the electrolysis of an aqueous solution of $B$ using a Castner-Kellner cell with mercury as the cathode and carbon as the anode. $A$ and $B$ respectively are:

Which of the following compounds is obtained as a by-product in the synthesis of sodium carbonate by the Solvay process?