Which of the following isotopes of hydrogen has the maximum sum of $e^- + p^+ + n^0$?

Identify the electron-rich hydrides from the following.

Pure dihydrogen $(99.95\%)$ is obtained by the electrolysis of

Which of the following orders is incorrect?

Which compound is formed on catalytic hydrogenation of carbon monoxide at high $p$ and high $T$ in the presence of $ZnO-Cr_2O_3$ catalyst?

In the synthesis of which compound is water gas used?