Chemistry - Surface Chemistry Question with Solution | TestHub

ChemistrySurface ChemistryGeneralEasy2 minPYQ_2020
ChemistryEasysingle choice

10 mL of 1 mM surfactant solution forms a monolayer covering0.24 cm2on a polar substrate. If the polar head is approximated as cube, what is its edge length?

Options:

Answer:
A
Solution:

Millimoles=10×10-3=10-2

Moles=10-5

No. of molecules=6×1023×10-5=6×1018

Surface area ocupied by one molecule

=0.246×1018=0.04×10-18cm2

4×10-20=x2[x=edge length ]

x=2×10-10cm=2pm

Stream:NTA_ABHYASSubject:ChemistryTopic:Surface ChemistrySubtopic:General
2mℹ️ Source: PYQ_2020

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