Hydrogen is produced by the reaction:

Hydrogen has three isotopes $(A)$,$(B)$ and $(C)$. If the number of neutron$(s)$ in $(A)$,$(B)$ and $(C)$ respectively,are $(x)$,$(y)$ and $(z)$,the sum of $(x)$,$(y)$ and $(z)$ is:

Which of the following chemicals contains chlorine?

Which of the following is an ionic hydride?

The charring of sugar takes place when treated with concentrated $H_2SO_4$. What is the type of reaction involved in it?

During the electrolysis of fused calcium hydride $(CaH_2)$,where is hydrogen produced?