Van’t Hoff Factor and its Significance NEET Questions

Physical Chemistry - Solutions

Van’t Hoff Factor and its Significance MCQ Questions


7.
For a solute that undergoes dissociation into two or more ions or particles in solution, the van't Hoff factor (i) is:
A.
Less than 1
B.
Equal to zero
C.
Greater than 1
D.
Equal to 1
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ANSWER :
C. Greater than 1
8.
For a solute that undergoes association (combination of two or more molecules into a larger aggregate) in solution, the van't Hoff factor (i) is:
A.
Less than 1
B.
Equal to infinity
C.
Greater than 1
D.
Equal to 1
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ANSWER :
A. Less than 1
9.
For an aqueous solution of sodium chloride (NaCl), which dissociates completely into Na⁺ and Cl⁻ ions, the theoretical (maximum) value of the van't Hoff factor (i) is:
A.
2
B.
3
C.
0.5
D.
1
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ANSWER :
A. 2
10.
For an aqueous solution of potassium sulphate (K₂SO₄), which dissociates completely to give three ions, the theoretical (maximum) value of the van't Hoff factor (i) is:
A.
3
B.
1
C.
4
D.
2
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ANSWER :
A. 3
11.
For an aqueous solution of calcium chloride (CaCl₂), which dissociates completely into Ca²⁺ and two Cl⁻ ions, the theoretical (maximum) value of the van't Hoff factor (i) is:
A.
3
B.
4
C.
2
D.
1
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ANSWER :
A. 3
12.
Acetic acid, when dissolved in benzene, tends to dimerize due to hydrogen bonding. In such a case, the van't Hoff factor (i) for complete dimerization approaches a value of:
A.
3
B.
2
C.
1
D.
0.5
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ANSWER :
D. 0.5