Question

For question numbers 4, 5and6, two statements are given – one labeled Assertion (A) other

labeled reason(R). Select the correct answer to these questions from the codes (a),(b),(c) and

(d) as given below: (3)

(a) Both A and R are true, and R is the correct explanation of the assertion

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

(c) A is true, but R is false

(d) A is false, but R is true

4. Assertion: Helium has 2 valence electrons and its valency is 0.

Reason : Helium is most abundant element in universe​

Answer 1

Answer:

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Answer 2

Answer:

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