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?
- AOnly one
- BOnly two
- COnly three
- DAll fourCorrect
Explanation
All four listed items are products of volcanic eruptions:
-
Pyroclastic debris: This refers to fragmented material ejected from a volcano during an explosive eruption, including rock fragments, ash, pumice, and volcanic bombs.
-
Ash and dust: Volcanic ash consists of tiny particles of pulverized rock, minerals, and volcanic glass, often ejected in large quantities during eruptions. Volcanic dust is even finer.
-
Nitrogen compounds: Volcanic gases include various compounds, and while water vapor and carbon dioxide are the most abundant, nitrogen (N₂) and minor nitrogen compounds (like NO, NO₂, NH₃) are also released. Nitrogen is the most abundant gas in Earth's atmosphere, and it is a constituent of the magmatic gases.
-
Sulphur compounds: Sulphur dioxide (SO₂), hydrogen sulfide (H₂S), and other sulphur compounds are significant components of volcanic gases. SO₂ is particularly known for its atmospheric effects, contributing to acid rain and influencing climate.
Therefore, all four are products of volcanic eruptions.

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