Q.

Y g of a non-volatile solute of molar mass M is dissolved in 250 g of benzene. If Kb is molal elevation constant, the value of ΔT is given by:

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2Y Kb/M

4Y Kb/M

2Y Kb/4 M

2.5 Y Kb/M

answer is B.

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Detailed Solution

ΔT=Kb×wB×1000mB×wA =Kb×Y×1000M×250=4KbYM

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