Different Methods for Expressing the Concentration of Solution (Molality, Molarity, Mole Fraction,..) NEET Questions

Physical Chemistry - Solutions

Different Methods for Expressing the Concentration of Solution (Molality, Molarity, Mole Fraction,..) MCQ Questions


7.
Mole fraction of a component is always:
A.
Less than 1
B.
Greater than 1
C.
Equal to 1
D.
Negative
😑 View Answer Rough Work Error
ANSWER :
A. Less than 1
8.
A solution is prepared by dissolving 10 g of NaOH in 90 g of water. The mass percentage of NaOH is:

NEET - 2023

A.
10%
B.
11.10%
C.
9%
D.
12%
😑 View Answer Rough Work Error
ANSWER :
B. 11.10%
9.
Which method expresses concentration in grams of solute per 100 g of solution?
A.
Molality
B.
Molarity
C.
Weight percent
D.
Volume percent
😑 View Answer Rough Work Error
ANSWER :
C. Weight percent
10.
The molality of a solution containing 5 moles of solute in 2 kg of solvent is:

NEET - 2022

A.
2.5 m
B.
0.4 m
C.
5 m
D.
10 m
😑 View Answer Rough Work Error
ANSWER :
A. 2.5 m
11.
The sum of mole fractions of all components in a solution is always:
A.
0
B.
1
C.
100
D.
10²
😑 View Answer Rough Work Error
ANSWER :
B. 1
12.
If the vapor pressure of pure solvent is 100 mmHg and that of its solution is 95 mmHg, the relative lowering of vapor pressure is:

NEET - 2018

A.
0.05
B.
0.95
C.
0.005
D.
0.5
😑 View Answer Rough Work Error
ANSWER :
A. 0.05