Q. 415.0( 4 Votes )

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A) : Combustion of 16 g of methane gives 18 g of water.

Reason (R) : In the combustion of methane, water is one of the products.

A. Both A and R are true but R is not the correct explanation of A.

B. A is true but R is false.

C. A is false but R is true.

D. Both A and R are false.

Answer :

Combustion of methane is given by the reaction

CH4(g) + 2O2(g) CO2(g) + 2H2O(g)

If 1 mol of methane is combusted completely, it will give 2 mol of H2O. Hence, 16g of methane on combustion gives 36g of H2O not 18g.

So, from the above reaction we can conclude that H2O is a product.

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