Lessons

Eamcet Chemistry
1st Year : Unit 1.2 (Basics & Concepts) - Emperical & Molecular Formula

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Q.

0.2 mole of an alkane on combustion gives 26.4g CO2 gas then molecular formula of alkane is

View Answer

Correct choice: D

Explanation:

 0.2moles give 26.4gm CO2
Thus 1mole gives 26.4/0.2 =132gm= 132/44 =3 moles CO2.
∴ Alkane has 3 carbon atoms. ∴ Formula is C3H8
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