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UPSC 2012: 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?
(a)1, 2 and 3 only
(b)1, 3 and 4 only
(c)2 and 4 only
(d)1, 2, 3 and 4
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Not attemptedCorrect Answer: (b) 1, 3 and 4 only
Capillary action draws liquid kerosene up a lamp wick, lets blotting paper absorb ink, and enables water to rise through xylem vessels to the crowns of tall trees; without it, these three processes would fail. Using a straw depends on creating a pressure difference by suction, not on capillarity, so statement 2 would still be possible. Thus statements 1, 3 and 4 are correct. ([britannica.com](https://www.britannica.com/technology/kerosene-lamp?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2012 Science & Technology question?▼
The correct answer is option (b): 1, 3 and 4 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Physics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2012, GS Paper 1, as Question 93. It falls under Science & Technology > Physics.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Physics?▼
UPSC has asked 104 questions from Physics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.