UPSC Prelims 2024 Question:

Consider the following

1. Pyroclastic debris
2. Ash and dust
3. Nitrogen compounds
4. Sulphur compounds
   
   

How many of the above are products of volcanic eruptions?

Explanation:

• The material in the upper mantle portion is called magma. Once it starts moving towards the crust or it reaches the surface, it is referred to as lava. The material that reaches the ground includes lava flows, pyroclastic debris, volcanic bombs, ash and dust and gases such as nitrogen compounds, sulphur compounds and minor amounts of chlorene, hydrogen and argon.
  
  

So, all four of the above are products of volcanic eruptions.

Therefore, option (4) is the correct answer.

Subject: Geography | Earthquakes and Volcanoes