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Q. No.\(250 \mathrm{~g}\) solution of D-glucose in water contains\(\text { 10.8% }\)of carbon by weight. The molality of the solution is nearest to: (Given: Atomic Weights are, \(\mathrm{H}, 1 \mathrm{u} ; \mathrm{C}, 12 \mathrm{u} ; \mathrm{O}, 16 \mathrm{u}\))
1. \(1.03\)
2. \(2.06\)
3. \(3.09\)
4. \(5.40\)
Subtopic: Introduction & Colligative properties |
62%
Level 2: 60%+
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Given below are two statements :
| Assertion (A) : | At \(\mathrm{10^\circ C}\), the density of a \(5~\text{M}\) solution of \(\text{KCl}\) [atomic masses of \(\text{K}\) & \(\text{Cl}\) are \(39\) & \(35.5~\text{g}~\text{mol}^{-1}\) respectively], is \(\text{‘x’} \text{g} ~\text{ml}^{–1} \). The solution is cooled to \(\mathrm{–21^\circ C.}\) The molality of the solution will remain unchanged. |
| Reason (R) : | The molality of a solution does not change with temperature as mass remains unaffected with temperature. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Introduction & Colligative properties |
94%
Level 1: 80%+
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The solubility of \(\mathrm{AgCl}\) will be maximum in which of the following?
1. \(\mathrm{0.01 ~M ~KCl}\)
2. \(\mathrm{0.01 ~M ~HCl}\)
3. \(\mathrm{0.01 ~M ~AgNO_3}\)
4. Deionised water
1. \(\mathrm{0.01 ~M ~KCl}\)
2. \(\mathrm{0.01 ~M ~HCl}\)
3. \(\mathrm{0.01 ~M ~AgNO_3}\)
4. Deionised water
Subtopic: Introduction & Colligative properties |
67%
Level 2: 60%+
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- 1(current)
Q. No.
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