Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedEasy2 minPYQ_2020
ChemistryEasysingle choice

A mixture of methane and ethene in a molar ratio ofx:yhas an average molecular mass of20 u. The mean molar mass when they are mixed in the molar ratio ofy:xwill be -

Options:

Answer:
C
Solution:

Mol. wt. ofCH4=16

Mol. wt. ofC2H4=28

∴20=16x+28yx+y

or16x+28 y=20 x+20 y

or4x=8y

orx=2y

In the gaseous mixture when the mole ratio ofCH4andC2H4isy : x

thenavg. mol. wt=16y+28xx+y=16y+56y3y

=72y3y=24 u

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Mole ConceptSubtopic:Miscellaneous/Mixed
⏱ 2mℹ️ Source: PYQ_2020

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