1
JEE Main 2022 (Online) 25th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
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Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 g of water, it depresses the freezing point by 0.2$$^\circ$$C. The percentage association of solute A in water, is :

[Given : Molar mass of A = 93 g mol$$-$$1. Molal depression constant of water is 1.86 K kg mol$$-$$1.]

A
50%
B
60%
C
70%
D
80%
2
JEE Main 2021 (Online) 31st August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Which one of the following 0.10 M aqueous solutions will exhibit the largest freezing point depression?
A
hydrazine
B
glucose
C
glycine
D
KHSO4
3
JEE Main 2021 (Online) 22th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Which one of the following 0.06 M aqueous solutions has lowest freezing point?
A
Al2(SO4)3
B
C6H12O6
C
KI
D
K2SO4
4
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 M H3PO3 solution and 100 mL of 2 M H3PO2 solution, respectively, are :
A
100 mL and 50 mL
B
100 mL and 200 mL
C
100 mL and 100 mL
D
50 mL and 50 mL
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