As compared to lithium,sodium reacts quickly with water because

The ionic mobility of alkali metal ions in aqueous solution is maximum for

Which one of the following is manufactured by the electrolysis of fused sodium chloride?

Two alkali halide salts,$ACl$ and $BCl$,gave crimson red and violet colors in their flame tests,respectively. $A$ and $B$ are respectively:

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A):$ Lithium salts are hydrated.
Reason $(R):$ Lithium has higher polarising power than other alkali metal group members.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following is called white vitriol?