Which of the following is an alkali metal?

Which of the following is an alkali metal?
  1. Ba
  2. Cs
  3. Ca
  4. Sr

Solution

The alkali metals consist of the chemical elements lithium (Li), sodium $(\mathrm{Na})$, potassium $(\mathrm{K})$, rubidium $(\mathrm{Rb})$, caesium $(\mathrm{Cs})$, and francium (Fr).

Asked in: MHT CET 2021 (24 Sep Shift 2)

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