Mercury is transported in metal containers made of

Which of the following is the correct arrangement in increasing order of solubility?

The reaction between sodium and water can be made less vigorous by

The blue color of a solution of sodium in liquid ammonia is due to the presence of.....

$2Na_2O \overset{400 \ ^oC}{\rightleftharpoons} A + 2Na$
$A + SO_2 \to Na_2SO_4$
$A + CO \to Na_2CO_3$
In the above reaction,$A$ is:

The order of negative standard electrode potential values $(E^\circ_{M^+/M})$ for $Li$,$Na$,and $K$ is: