Which one of the following alkali metals gives hydrated salts?

Which of the following is $NOT$ present in baking powder?

Identify the correct statements about alkali metals.
$A$. The order of standard reduction potential $(M^{+} \mid M)$ for alkali metal ions is $Na > Rb > Li$.
$B$. $CsI$ is highly soluble in water.
$C$. Lithium carbonate is highly stable to heat.
$D$. Potassium dissolved in concentrated liquid ammonia is blue in colour and paramagnetic.
$E$. All the alkali metal hydrides are ionic solids.
Choose the correct answer from the options given below.

Which of the following is most stable?

Sodium metal can be stored under

Number of paramagnetic oxides among the following given oxides is ..... .
$Li_{2}O, CaO, Na_{2}O_{2}, KO_{2}, MgO$ and $K_{2}O$