Q. Which one of the following statements is true for all the alkali metals?
A) Their nitrates decompose on heating to give $NO_{2}\ and\ O_{2}.$
B) Their carbonates decompose on heating to give $CO_{2}$ 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 $MX.$
Explanation
(d)
Alkali metals react with halogen to give halides. They are normally represented by $M^{+}X^{-}.$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.