Question

Assertion (A) Elements of first group are known as the alkali metals.
Reason (R) : Alkali metals have two valence electrons.
(i) Both (A) and (R) are true and (R) is the correct explanation of (A).

(ii) Both (A) and (R) are true, but (R) is not the correct explanation of (A),

(iii) (A) is true but (R) is false,

(iv) (A) is false but (R) is true​
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Answer 1

Answer:

option ii

Explanation:

the elements are called so because they form hydroxides on water not because of their low valency