Question

Assertion (A): Number of atoms of He in 60 u of He is 15.
Reason (R) Atomic weight of He is 4 u.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

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Answer 1

Answer:

option A --: Both A and R are true and R is the correct explanation of A.

Explanation:

15*4u = 60u

Answer 2

Answer:

A

Explanation:

ATOMIC WEIGHT OF HE = 4

60/4= 15

SO NO OF ATOMS OF HE IN 60 U = 15

SO REASON IS THE CORRECT EXPLANATION OF THE ASSERTION