Statement-I: Methane absorbs infrared radiation at wavelengths where carbon dioxide, water vapor, and most other greenhouse gases do not.
Statement- II: Methane per molecule is far more potent than carbon dioxide as a greenhouse gas.

Which one of the following is correct in respect of the above statements?

1. In solids, generally, the heat is transferred by conduction.
2. In liquids and gases, the heat is transferred by convection.
3. Medium is required for the transfer of heat by radiation.

How many of the statements given above are correct?

1. It is necessary for the growth and maintenance of bones and teeth in animals.
2. Rocks and other deposits are its main reservoir.
3. It is mainly available to living resources through the weathering of rocks.

The above statement refers to which of the following minerals?

Statement-I: Excessive use of Sodium nitrate as a fertilizer makes the soil acidic and unsuitable for plant growth.

Statement II:  Acidic soils are reclaimed by the addition of calcium carbonate.

Which one of the following is correct in respect of the above statements?