Consider the following:

Question

1. Pyroclastic debris

2. Ash and dust

3. Nitrogen compounds

4. Sulphur compounds

How many of the above are products of volcanic eruptions?

(a) Only one
(b) Only two
(c) Only three
(d) All four

Answer 1

(c) Only three

Explanation:

• Pyroclastic debris: Correct. Pyroclastic debris consists of fragments of rock and volcanic glass created during explosive volcanic eruptions.

• Ash and dust: Correct. Volcanic ash and dust are fine particles ejected into the atmosphere during volcanic eruptions.

• Nitrogen compounds: Incorrect. While volcanic eruptions release various gases, nitrogen compounds are not significant products of volcanic eruptions. The primary gases released include water vapor, carbon dioxide, and sulfur dioxide.

• Sulphur compounds: Correct. Sulfur compounds, such as sulfur dioxide, are commonly released during volcanic eruptions and can lead to the formation of sulfuric acid aerosols in the atmosphere.

Therefore, pyroclastic debris, ash and dust, and sulfur compounds are products of volcanic eruptions, making three correct options. Hence, the correct answer is (c) Only three.