Cause of red soil colour — UPSC Prelims PYQ 2010
When you travel in certain parts of India, you will notice red soil. What is the main reason for this colour?
- Abundance of magnesium
- Accumulated humus
- Presence of ferric oxides
- Abundance of phosphates
Explanation
Option (c) is correct
- Red soil derives its colour from the presence of iron oxides, particularly ferric oxide. When iron compounds are oxidized under well-drained conditions, they impart a red or reddish-brown colour to the soil.
Answer: (c) Presence of ferric oxides
