Which of the following statements about $H_2SO_4$ is incorrect?

If a mole of $H_2$ molecules is heated to a high temperature,which of the following reactions takes place?

In all its properties,hydrogen resembles

What do you understand by the term "non-stoichiometric hydrides"? Do you expect this type of the hydrides to be formed by alkali metals? Justify your answer.

The name hydrogen was given by

Which of the following is expected to be higher for a proton $(H^+)$ compared to other ions?