1.

Assertion(A): On burning magnesium in oxygen, the mass of magnesium oxide formed is equal to the total mass of oxygen and magnesium. Reason(R): In a chemical substance, the elements are always present in a constant proportion. (a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). (b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A). (c) Assertion (A) is true but reason (R) is false. (d) Assertion (A) is false but reason (R) is true

Answer» ONG>ANSWER:

(b) Both assertion (A) and reason (R) are true but reason (R) is not the

correct EXPLANATION of assertion (A).

Explanation:



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