319253
A solution containing \(10.2 \mathrm{~g}\) glycerine per litre is isotonic with a \(2 \%(\mathrm{w} / \mathrm{v})\) solution of glucose. What is the molecular mass of glycerine?
1 \(91.8 \mathrm{~g}\)
2 \(1198 \mathrm{~g}\)
3 \(83.9 \mathrm{~g}\)
4 \(890.3 \mathrm{~g}\)
Explanation:
\(\pi_{\text {Glycerine }}=\pi_{\text {Glucose }}\) (isotonic solutions have same osmotic pressure). \(\dfrac{\mathrm{n}_{1} \mathrm{RT}}{\mathrm{v}_{1}}=\dfrac{\mathrm{n}_{2} \mathrm{RT}}{\mathrm{v}_{2}}\) \(\dfrac{10.2}{\mathrm{M}} \times \dfrac{1}{1}=\dfrac{2}{180} \times \dfrac{1000}{100}\) \(\mathrm{M}=\dfrac{10.2 \times 18}{2}=91.8 \mathrm{~g}\) (Density of water \(=1\) \(\left.\mathrm{g} / \mathrm{cm}^{3}\right)\)
CHXII02:SOLUTIONS
319254
Consider the following statements I : Osmosis takes place with increase of entropy. II : Osmosis is a non-spontaneous process. III : Free energy decreases during osmosis. Which of the above is/are correct?
1 I only
2 I and II
3 II and III
4 I and III
Explanation:
Osmosis is a spontaneous process \(\left( {{\rm{\Delta G < 0}}} \right)\) which takes place with \({\rm{\Delta S > 0}}\) (due to transfer of solvent in solution)
CHXII02:SOLUTIONS
319255
An electrolyte A gives 3 ions and B is a nonelectrolyte. If 0.1 M solution of B produces an osmotic pressure P , then 0.05 M solution of A will produce pressure, assuming that the electrolyte is completely ionised.
319256
A 0.004 M solution of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) is isotonic with a 0.010 M solution of glucose at same temperature. The apparent degree of dissociation of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) is
319253
A solution containing \(10.2 \mathrm{~g}\) glycerine per litre is isotonic with a \(2 \%(\mathrm{w} / \mathrm{v})\) solution of glucose. What is the molecular mass of glycerine?
1 \(91.8 \mathrm{~g}\)
2 \(1198 \mathrm{~g}\)
3 \(83.9 \mathrm{~g}\)
4 \(890.3 \mathrm{~g}\)
Explanation:
\(\pi_{\text {Glycerine }}=\pi_{\text {Glucose }}\) (isotonic solutions have same osmotic pressure). \(\dfrac{\mathrm{n}_{1} \mathrm{RT}}{\mathrm{v}_{1}}=\dfrac{\mathrm{n}_{2} \mathrm{RT}}{\mathrm{v}_{2}}\) \(\dfrac{10.2}{\mathrm{M}} \times \dfrac{1}{1}=\dfrac{2}{180} \times \dfrac{1000}{100}\) \(\mathrm{M}=\dfrac{10.2 \times 18}{2}=91.8 \mathrm{~g}\) (Density of water \(=1\) \(\left.\mathrm{g} / \mathrm{cm}^{3}\right)\)
CHXII02:SOLUTIONS
319254
Consider the following statements I : Osmosis takes place with increase of entropy. II : Osmosis is a non-spontaneous process. III : Free energy decreases during osmosis. Which of the above is/are correct?
1 I only
2 I and II
3 II and III
4 I and III
Explanation:
Osmosis is a spontaneous process \(\left( {{\rm{\Delta G < 0}}} \right)\) which takes place with \({\rm{\Delta S > 0}}\) (due to transfer of solvent in solution)
CHXII02:SOLUTIONS
319255
An electrolyte A gives 3 ions and B is a nonelectrolyte. If 0.1 M solution of B produces an osmotic pressure P , then 0.05 M solution of A will produce pressure, assuming that the electrolyte is completely ionised.
319256
A 0.004 M solution of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) is isotonic with a 0.010 M solution of glucose at same temperature. The apparent degree of dissociation of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) is
319253
A solution containing \(10.2 \mathrm{~g}\) glycerine per litre is isotonic with a \(2 \%(\mathrm{w} / \mathrm{v})\) solution of glucose. What is the molecular mass of glycerine?
1 \(91.8 \mathrm{~g}\)
2 \(1198 \mathrm{~g}\)
3 \(83.9 \mathrm{~g}\)
4 \(890.3 \mathrm{~g}\)
Explanation:
\(\pi_{\text {Glycerine }}=\pi_{\text {Glucose }}\) (isotonic solutions have same osmotic pressure). \(\dfrac{\mathrm{n}_{1} \mathrm{RT}}{\mathrm{v}_{1}}=\dfrac{\mathrm{n}_{2} \mathrm{RT}}{\mathrm{v}_{2}}\) \(\dfrac{10.2}{\mathrm{M}} \times \dfrac{1}{1}=\dfrac{2}{180} \times \dfrac{1000}{100}\) \(\mathrm{M}=\dfrac{10.2 \times 18}{2}=91.8 \mathrm{~g}\) (Density of water \(=1\) \(\left.\mathrm{g} / \mathrm{cm}^{3}\right)\)
CHXII02:SOLUTIONS
319254
Consider the following statements I : Osmosis takes place with increase of entropy. II : Osmosis is a non-spontaneous process. III : Free energy decreases during osmosis. Which of the above is/are correct?
1 I only
2 I and II
3 II and III
4 I and III
Explanation:
Osmosis is a spontaneous process \(\left( {{\rm{\Delta G < 0}}} \right)\) which takes place with \({\rm{\Delta S > 0}}\) (due to transfer of solvent in solution)
CHXII02:SOLUTIONS
319255
An electrolyte A gives 3 ions and B is a nonelectrolyte. If 0.1 M solution of B produces an osmotic pressure P , then 0.05 M solution of A will produce pressure, assuming that the electrolyte is completely ionised.
319256
A 0.004 M solution of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) is isotonic with a 0.010 M solution of glucose at same temperature. The apparent degree of dissociation of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) is
319253
A solution containing \(10.2 \mathrm{~g}\) glycerine per litre is isotonic with a \(2 \%(\mathrm{w} / \mathrm{v})\) solution of glucose. What is the molecular mass of glycerine?
1 \(91.8 \mathrm{~g}\)
2 \(1198 \mathrm{~g}\)
3 \(83.9 \mathrm{~g}\)
4 \(890.3 \mathrm{~g}\)
Explanation:
\(\pi_{\text {Glycerine }}=\pi_{\text {Glucose }}\) (isotonic solutions have same osmotic pressure). \(\dfrac{\mathrm{n}_{1} \mathrm{RT}}{\mathrm{v}_{1}}=\dfrac{\mathrm{n}_{2} \mathrm{RT}}{\mathrm{v}_{2}}\) \(\dfrac{10.2}{\mathrm{M}} \times \dfrac{1}{1}=\dfrac{2}{180} \times \dfrac{1000}{100}\) \(\mathrm{M}=\dfrac{10.2 \times 18}{2}=91.8 \mathrm{~g}\) (Density of water \(=1\) \(\left.\mathrm{g} / \mathrm{cm}^{3}\right)\)
CHXII02:SOLUTIONS
319254
Consider the following statements I : Osmosis takes place with increase of entropy. II : Osmosis is a non-spontaneous process. III : Free energy decreases during osmosis. Which of the above is/are correct?
1 I only
2 I and II
3 II and III
4 I and III
Explanation:
Osmosis is a spontaneous process \(\left( {{\rm{\Delta G < 0}}} \right)\) which takes place with \({\rm{\Delta S > 0}}\) (due to transfer of solvent in solution)
CHXII02:SOLUTIONS
319255
An electrolyte A gives 3 ions and B is a nonelectrolyte. If 0.1 M solution of B produces an osmotic pressure P , then 0.05 M solution of A will produce pressure, assuming that the electrolyte is completely ionised.
319256
A 0.004 M solution of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) is isotonic with a 0.010 M solution of glucose at same temperature. The apparent degree of dissociation of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) is
