# According to Charles’ law, the volume of a gas becomes zero at…

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A. 0°C

B. -100°C

C. -273°C

D. -373°C

C

## SOLUTION…

According to Charles law, the volume of a gas is zero at zero kelvin.

Mathematically,

So, we need to convert each of the options from degree Celsius to kelvin and the option with 0 kelvin takes it.

### Now for the right answer to the above question:

1. Option A is incorrect. 0 degree Celsius = 273K
2. Option B is incorrect. -100 degree Celsius = 273 – 100 = 173K
3. C is correct. -273 degree Celsius = 273 – 273 = 0 K
4. D is not the correct answer. -373 degree Celsius = 273 – 373 = -100K

## QUICK TIPS…

• At zero kelvin, the volume of any gas is zero.

Use the questions and answers session to deal further on this topic…

/ culled from 2018 JAMB-UTME Chemistry question 30 /

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