Q93.
Consider the following statements: If there were no phenomenon of capillarity 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. The blotting paper would fail to function. 4. The big trees that we see around would not have grown on the Earth. Which of the statements given above are correct?
Answer
B
Explanation
Statement 1 is correct: Kerosene lamps work because kerosene rises up the wick by capillary action. Statement 2 is incorrect: Drinking through a straw uses air pressure (atmospheric pressure pushing liquid up), NOT capillarity. Statement 3 is correct: Blotting paper absorbs ink by capillary action — without capillarity, it wouldn't function. Statement 4 is correct: In big trees, water rises from roots to leaves (sometimes 100 meters high) partly due to capillary action in xylem vessels. Without capillarity, tall trees couldn't transport water.