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

Which of the following oxides is amphoteric in character?

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

The number of 3C$$-$$2e^$$-$$ bonds present in diborane is

The total number of P$$-$$OH bonds for pyrophosphoric acid

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

Which is not an anti-fluorite structure

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

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. (A) is a useful organic reagent. The compound (A) is