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}^{-}} $ .