Assertion :Elements of group I are called 'alkali metals'. Reason: All the alkali metals react with water.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Answer is option (B)
Group $1$ elements are called alkali metals because they form hydroxides on reaction with water which are strongly alkaline in nature.

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Assertion :Elements of group I are called 'alkali metals'. Reason: All the alkali metals react with water.

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for AssertionAnswer is option (B)Group 1 elements are called alkali metals because they form hydroxides on reaction with water which are strongly alkaline in nature.

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Answer is option (B)
Group $1$ elements are called alkali metals because they form hydroxides on reaction with water which are strongly alkaline in nature.