Ideal and Non-Ideal Solutions NEET Questions

Physical Chemistry - Solutions

Ideal and Non-Ideal Solutions MCQ Questions


1.
An ideal solution is one which:
A.
Obeys Raoult's law only at low concentration
B.
Has zero vapour pressure
C.
Obeys Henry's law at all concentrations
D.
Obeys Raoult's law over the entire range of concentration
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ANSWER :
D. Obeys Raoult's law over the entire range of concentration
2.
Which of the following conditions must be satisfied by an ideal solution?
A.
ΔmixH = 0 and ΔmixV > 0
B.
ΔmixH > 0 and ΔmixV > 0
C.
ΔmixH < 0 and ΔmixV < 0
D.
ΔmixH = 0 and ΔmixV = 0
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ANSWER :
D. ΔmixH = 0 and ΔmixV = 0
3.
For an ideal solution, ΔmixG (Gibbs free energy of mixing) is:
A.
Equal to ΔmixH
B.
Zero
C.
Positive
D.
Negative (always spontaneous)
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ANSWER :
D. Negative (always spontaneous)
4.
For an ideal solution, ΔmixS (entropy of mixing) is:
A.
Positive (greater than zero)
B.
Negative
C.
Equal to ΔmixH
D.
Zero
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ANSWER :
A. Positive (greater than zero)
5.
Volume of an ideal solution equals:
A.
Greater than the sum of volumes of pure components
B.
Sum of volumes of pure components (V = V_A + V_B)
C.
Less than the sum of volumes of pure components
D.
Zero
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ANSWER :
B. Sum of volumes of pure components (V = V_A + V_B)
6.
When two liquids form an ideal solution, no heat is:
A.
Absorbed or evolved during mixing
B.
Absorbed but heat is evolved
C.
Lost from the system
D.
Evolved but heat is absorbed
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ANSWER :
A. Absorbed or evolved during mixing