In the following question 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.

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

ii) A is true but R is false.

iii) A is false but R is true.

iv) Both A and R are false.

Question

Philoid · Accepted Answer

→iii) A is false but R is true.

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.