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Question

A solution containing 500g of a protein per litre is isotonic with a solution containing 3.42g of sucrose per litre. The molecular mass of protein is:

A
5
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B
146
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C
34200
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D
50000
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Solution

The correct option is D 50000
Two solutions are said to isotonic when they are at the same concentrations.

The molar mass of sucrose =342

C1= Concentration of protein
C2= Concentration of sucrose

Since, they are isotonic, C1=C2

500Molar mass of protein=3.42342

Molar mass of protein =500×100=50000 g

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