Question

Assertion (A): Steam is the most abundant gas that comes out of a volcano.

Reason (R): Violent eruptions, known as bombs, eject materials varying in size.

Options

• Both A and R are true, and R is the correct explanation of A.

• Both A and Rare true, but R does not explain A.

• A is true, but R is false.

• A is false, but R is true.

Answer 1

Both A and R are true, but R does not explain A.

Explanation:

Both the Assertion and the Reason are true, but the Reason does not explain the Assertion. Steam, or water vapour, is indeed the most abundant gas emitted from volcanoes because groundwater and magmatic water are released as steam when magma rises and decompresses. However, the Reason talks about violent eruptions ejecting materials of varying sizes, known as volcanic bombs, which is a separate fact. While both statements are correct individually, the Reason does not explain why steam is the most abundant gas in volcanic emissions.