In the water-gas shift reaction,hydrogen gas is produced from the reaction of steam with

Which one of the following statements is not correct for ortho and para hydrogen?

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:

Saline hydrides are known to react with water violently producing fire. Can $CO_2$,a well-known fire extinguisher,be used in this case? Explain.

Ortho-hydrogen and para-hydrogen resemble in which of the following properties?

Hydrogen iodide cannot be prepared by the action of concentrated $H_2SO_4$ on potassium iodide because: