Consider the following statements : If there were no phenomenon of capillary 1. it would be difficult to use a kerosene lamp 2. one would not be able to use a straw to consume a soft drink 3. he blotting paper would fail to function 4. he big trees that w

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Q: 18 (IAS/2012)
Consider the following statements : If there were no phenomenon of capillary
1. it would be difficult to use a kerosene lamp
2. one would not be able to use a straw to consume a soft drink
3. he blotting paper would fail to function
4. he big trees that we see around would not have grown on the Earth
Which of the statements given above are correct?

question_subject: 

Science

question_exam: 

IAS

stats: 

0,47,47,8,47,3,36

keywords: 

{'straw': [1, 0, 0, 1], 'kerosene lamp': [0, 0, 0, 1], 'soft drink': [0, 0, 0, 1]}

The answer involves understanding the applications of capillarity in our daily life and in nature.

1. The kerosene lamp works on the principle of capillarity which allows the kerosene to rise through the wick to be burned. Therefore, this statement is correct.

2. Drinking from a straw isn`t an example of capillarity but atmospheric pressure. You create a vacuum by sucking on the straw, and the greater atmospheric pressure on the surface of the liquid pushes it into the straw. Therefore, this statement isn`t correct.

3. Blotting paper absorbs ink through capillarity. Without capillarity, it wouldn`t function. Hence, this statement is correct.

4. Capillarity also applies in plant physiology where it plays a part in water transport from the soil to the leaves, aiding the survival and growth of trees. Thus, this statement is right.

Based on the above analysis, option-2, with statements 1, 3, and 4 being correct, matches the correct answer.