Which of the following is / are the characteristic / characteristics of Indian coal?

1. High ash content

2. Low sulphur content

3. Low ash fusion temperature

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Which of the following is / are unique characteristic / characteristics ofequatorial forests?

1. Presence of tall closely set trees with crowns forming a continuous canopy

2. Coexistence of a large number of species

3. Presence of numerous varieties of epiphytes

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Which of the following adds/add nitrogen to the soil?

1. Excretion of urea by animals

2. Burning of coal by man

3. Death of vegetation

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On the planet earth, most of the freshwater exists as ice caps and glaciers. Outof the remaining freshwater, the largest proportion

The Narmada river flows to the west, while most other large peninsular riversflow to the east. Why?

1. It occupies a linear rift valley.

2. It flows between the Vindhyas and the Satpuras.

3. The land slopes to the west from central India.

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Variations in the length of daytime and nighttime from season to season aredue to