First slide

Theory of dilute solutions

Question

Arrange the following as directed: (Q.79-82) Increasing order of boiling points.
I. 0.001 m NaCl II. 0.001 m urea
III. 0.001 m MgCl₂ IV. 0.001 m CH₃COOH

Moderate

A

II < IV < I < III
B

II < I < IV < III
C

III < I < IV < II
D

III < IV < I < II

Solution

Boiling point is higher if $∆ T_{b}$ is higher which in turn depends on $m_{e f f} (= i m_{e f f})$
0.001 m urea < 0.001 m CH₃COOH < 0.001 m NaCI < 0.001 m MgCl₂
II < IV < I < III

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