Question

Assertion : Elements of group $1$ are called ‘alkali metals’.
Reason : All the alkali metals react with water.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

Group $1$ elements are called alkali metals because they form hydroxides on reaction with water which are strongly alkaline in nature.