The metal that produces $H_{2}$ with both dil. $HCl$ and $NaOH_{(aq)}$ is

Which of the following will be dissolved in excess of $NaOH$?

$NO_2$ is not obtained on heating:

Which of the following is the strongest reducing agent?

Which of the following alkali metals has the least melting point?

The correct statements are:
$I$. The low solubility of $LiF$ is due to its high lattice enthalpy.
$II$. $LiBr$ is soluble in acetone.
$III$. $LiCl$ is soluble in pyridine.
$IV$. The order of melting points of alkali metal halides is $MF > MCl > MBr > MI$.