p-Block Elements

Which of the following oxides is amphoteric in character?

Sulphur does not exist as \(\mathrm{S}_2\) molecule because

The total number of P\(-\)OH bonds for pyrophosphoric acid

The number of 3C\(-\)2e\(-\) bonds present in diborane is

Ge (II) compounds are powerful reducing agents whereas Pb (IV) compounds are strong oxidants. It can be because

Which is not an anti-fluorite structure

Which of the following inert gas is used as cryogenic agnet?

An inorganic halide (A) reacts with water to form two acids (B) and (C). (A) also reacts with NaOH to form two salts (D) and (E) which remain in solution. The solution gives white precipitate with both AgNO3 and BaCl2 solutions respectively...

(B) is identified by the characteristic colour of the flame. (A) and (B) are respectively :