JEE Main 20254 AprilEvening Shift
- Exam
- JEE Main
- Year
- 2025
- Date
- 4 April
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Solutions
JEE Main 2025 · 4 April · Evening Shift · Chemistry · Solutions
Given below are two statements : Statement (I) : Molal depression...
Given below are two statements :
Statement (I) : Molal depression constant is given by , where symbols have their usual meaning.
Statement (II) : for benzene is less than the for water.
In the light of the above statements, choose the most appropriate answer from the options given below :
Statement (I) : Molal depression constant is given by , where symbols have their usual meaning.
Statement (II) : for benzene is less than the for water.
In the light of the above statements, choose the most appropriate answer from the options given below :
Options
- AStatement I is incorrect but Statement II is correct
- BBoth Statement I and Statement II are incorrect
- CBoth Statement I and Statement II are correct
- DStatement I is correct but Statement II is incorrect
Correct answer
D. Statement I is correct but Statement II is incorrect
Step-by-step solution
Statement-IMolar depression constant \mathrm{k}_f=\frac{\mathrm{M}_1 \mathrm{RT}_{\mathrm{f}^2}{\Delta \mathrm{H}_{\text{fus }}}$\text{ but } \mathrm{k}_{\mathrm{f}} \text{\text{ for } benzene }=5.12 \frac{{ }^{\circ} \mathrm{C}}{\mathrm{molal}} \mathrm{k}_{\mathrm{f}}=1.86 \frac{{ }^{\circ} \mathrm{C}}{\text{ molal }}$ Hence statement- II is incorrect