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To convert a Celsius temperature to the absolute scale you add about:
A273
B373
C173
D473
Answer & Solution
Correct answer: A. 273
1. The absolute scale starts where gas volume would vanish.
2. We add 273, more precisely 273.15, to the Celsius reading.
3. So the correct answer is 273.
_Source: NCERT Class 11 Chemistry, Ch 5 'States of Matter'_
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