The metal mainly used in devising photoelectric cells is:

The $s$-block elements are characterised by their larger atomic sizes,lower ionisation enthalpies,invariable $+1$ oxidation state and solubilities of their oxosalts. In the light of these features,describe the nature of their oxides,halides and oxosalts.

Identify the incorrect statement from the following.

Give two uses of caustic soda.

Which oxide does not give a pink color with phenolphthalein in an aqueous solution?

Which of the following is most basic in character?