Question

silica (a) silica (d) natural gas Choose the correct option. 1. The most common mineral that make up rocks is (b) limestone (c) iron 2. The peeling off of the outer layers of rocks in concentric layers is called (a) exfoliation (b) granular disintegration (c) block disintegration (d) columnar disintegration 3. Rusting of iron is caused due to (a) carbonation (b) oxidation (c) hydration 4. Which of the following soil horizons contains humus? (b) B (c) C 5. Shelter belts are planted to check soil erosion in (a) hilly areas (b) areas with heavy rainfall (c) forested areas (d) dry areas (d) solution (a) A (d) D​

Answer 1

Explanation:

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