When the same amount of the solute 'P' and 'Q' are separately dissolved in 500 {\g} water, the \\Delta{T}_{ {f}} values are 0.15 {K} and 0.30 {K} respectively. If the molecular weight of is 80 {\g} {\mol}^{-1}, then the molecular weight of is{P}' is 80 {\g} \ {\mol}^{-1}, then the molecular weight of '{Q}' is{Q}' is{P}' is 80 {\g} \ {\mol}^{-1}, then the molecular weight of '{Q}' is

Correct Answer is : 40g mol−1

KEAM 2020 Physics and Chemistry Solved Paper

Question : 79 of 120

Marks: +1, -0

When the same amount of the solute 'P' and 'Q' are separately dissolved in 500g water, the ΔTf values are 0.15K and 0.30K respectively. If the molecular weight of ′P′ is 80g mol−1, then the molecular weight of ′Q′ is

30g mol−1
60g mol−1
40g mol−1
45g mol−1
0.10g mol−1

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P	Q
w1=500g	w1=500g
w2=xg	w2=xg
∆Tf=0.15	∆Tf=0.3
Mp80	M6=7