Which of the following is expected to be high for a proton $(H^+)$?

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.

When steam is passed over red hot iron,the substances formed are

In the following reaction,assign the state for the underlined atom in the product of complete hydrolysis at $R.T.$:
$\underline{B}_2H_6 + H_2O \longrightarrow H_3BO_3 + H_2 \uparrow$

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

What characteristics do you expect from an electron-deficient hydride with respect to its structure and chemical reactions?