Choose the right option based on the four statements given below.

1. Conventional rainfall is observed in the summers or in the hotter part of a day.

2. Nimbus clouds are rain clouds and are usually dark in colour.

3. Due to high pollution, smog has become more apparent during the winters.

4. A Richter scale is used to measure rainfall.

Only 1 is correct.

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1, 2 and 4 are correct.

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2, 3, and 4 are correct.

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1, 2 and 3 are correct

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Solution

The correct option is D 1, 2 and 3 are correct
Statements 1, 2 and 3 are correct. Conventional rainfall is the most common type of rainfall observed. It is accompanied by thunder and lightning. Nimbus clouds are dark rain clouds and contain a very high concentration of water droplets. Smog is a combination of smoke and fog. It is very apparent during winters due to the increased air pollution levels.
A Richter scale is used to measure earthquakes, whereas a rain gauge is used to measure rainfall.

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Q. Statement 1:

S O_{2} a n d N O

are some of the main pollutants that contribute to air pollution.

Statement 2: They acidify generally in nimbus clouds which leads to acid rains.

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