Which of the hydrogen halides forms salts like $KHX_2$ (where $X$ is a halogen atom)?

Write the names of the isotopes of hydrogen. What is the mass ratio of these isotopes?

Assertion : Sulphuric acid is more viscous than water.
Reason : Concentrated sulphuric acid has a great affinity for water.

Match List-$I$ with List-$II$

List-$I$ Type of Hydride	List-$II$ Example
$A$. Electron deficient hydride	$I$. $MgH_2$
$B$. Electron rich hydride	$II$. $HF$
$C$. Electron precise hydride	$III$. $B_2H_6$
$D$. Saline hydride	$IV$. $CH_4$

Choose the correct answer from the options given below:

Give reasons why hydrogen resembles alkali metals?

Which of the following pairs of reactions give $H_2$ gas as a product upon hydrolysis?