1
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25
Change Language

The correct order of boiling point of the given aqueous solutions is

A
$$1 \mathrm{~N} \mathrm{KNO}_3>1 \mathrm{~N} \mathrm{NaCl} >1 \mathrm{~N} \mathrm{CH}_3 \mathrm{COOH} \\ >1 \mathrm{~N} \text { sucrose }$$
B
$$1 \mathrm{~N} \mathrm{KNO}_3=1 \mathrm{~N} \mathrm{NaCl} >1 \mathrm{~N} \mathrm{CH}_3 \mathrm{COOH} \\ >1 \mathrm{~N} \text { sucrose }$$
C
Same for all
D
$$1 \mathrm{~N} \mathrm{KNO}_3=1 \mathrm{~N} \mathrm{NaCl} =1 \mathrm{~N} \mathrm{CH}_3 \mathrm{COOH} \\ >1 \mathrm{~N} \text { sucrose }$$
2
WB JEE 2023
MCQ (Single Correct Answer)
+1
-0.25
Change Language

A solution containing 4g of polymer in 4.0 litre solution at 27$$^\circ$$C shows an osmotic pressure of 3.0 $$\times$$ 10$$^{-4}$$ atm. The molar mass of the polymer in g/mol is

A
820000
B
82000
C
8200
D
820
3
WB JEE 2022
MCQ (Single Correct Answer)
+2
-0.5
Change Language

Pick the correct statement.

A
Relative lowering of vapour pressure is independent of T.
B
Osmotic pressure always depends on the nature of solute.
C
Elevation of boiling point is independent of nature of the solvent.
D
Lowering of freezing point is proportional to the molar concentration of solute.
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
When 20 g of naphthoic acid (C11H8O2) is dissolved in 50 g of benzene, a freezing point depression of 2K is observed. The van't Hoff factor (i) is [Kf = 1.72 K kg mol$$-$$1]
A
0.5
B
1.0
C
2.0
D
3.0
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