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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY
1
Medium
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Analyzing
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Statement I: When a hydrocarbon is burnt and the products of combustion are cooled to the original temperature and pressure, a contraction in volume occurs.
Statement II: The contraction in volume is solely due to the liquefaction of water vapours.
Statement II: The contraction in volume is solely due to the liquefaction of water vapours.
View answer and explanation
Correct option: C
If Statement I is CORRECT, but Statement II is INCORRECT
Option C is correct. Statement I is correct because combustion of hydrocarbons usually results in a contraction in volume. Statement II is incorrect because the contraction is due to the change in the number of moles of gaseous substances, not solely the liquefaction of water.
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