Why is the molecular mass determined by measuring the colligative property in case of some solutes is abnormal?
A
Due to association or dissociation of solute molecules
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B
Due to insolubility of solute molecules
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C
Due to decomposition of solute molecules
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D
Due to large size of solute molecules
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Solution
The correct option is A Due to association or dissociation of solute molecules Due to association or dissociation of solute molecules there is a change in number of particles. Since colligative properties depend on number of particles there is a change in molecular mass.