The strongest reducing agent among the alkali metals is

When carbon monoxide is passed over solid caustic soda heated to $200^{\circ} C$,it forms

Solvay process is used in the manufacture of

Which metal does not give the following reaction: $M + \text{water or steam} \to \text{oxide} + H_2 \uparrow$?

Which of the following alkali metals has a density greater than water?

Given below are two statements:
Statement $I$ : The $4f$ and $5f$-series of elements are placed separately in the Periodic table to preserve the principle of classification.
Statement $II$ : $S$-block elements can be found in pure form in nature.
In the light of the above statements,choose the most appropriate answer from the options given below :