Question

Which one of the following statements is true for all the alkali metals?

• A. Their nitrates decompose on heating to give $N{O}_2$ and $O_2$
• B. Their carbonates decompose on heating to give $C{O}_2$ and the metal oxide
• C. They react with oxygen to give mainly the oxide $M_{2}O$
• D. They react with halogens to give the halides $MX$
• E. They react with nitrogen to give nitrides

Answer 1

Answer: (D)

Alkali metal react with halogen to give halides. They are normally represented by $M^{+}{X}^{-}$ .