Question 61 : A solution with reasonably permanent pH is called a/an __________ solution.
1. buffer
2. non-ideal
3. colloidal
4. ideal
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Question 62 : A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be
1. -136.5°C
2. 0°K
3. - 136.5°K
4. -273°C
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Question 63 : An equation for calculating vapour pressure is given by, log10 P = A – B(t + c). This is called the
1. Kopp's rule
2. Antonic equation
3. Kistyakowsky equation
4. Trouton's rule
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Question 64 : Osmotic pressure of the solution can be increased by
1. diluting the solution.
2. none of these.
3. decreasing its temperature.
4. increasing the volume of the vessel containing the solution.
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Question 65 : At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant ?
1. 273°K
2. 100°C
3. 273°C
4. 200°C
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Question 66 : Solutions having the same osmotic pressure are called __________ solutions.
1. saturated
2. dilute
3. isotonic
4. ideal
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Question 67 : A vapor that exists above its critical temperature is termed as a __________ vapor.
1. saturated
2. gaseous
3. unsaturated
4. sub-cooled
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Question 68 : Heat of __________ of a fuel is called its calorific value.
1. reaction
2. vaporisation
3. formation
4. combustion
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Question 69 : Kinetic theory of gases stipulates that, the
1. molecules possess appreciable volume.
2. none of these.
3. absolute temperature is a measure of the kinetic energy of molecules
4. energy is lost during molecular collisions.
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Question 70 : Concentration of a solution expressed in terms of __________ is independent of temperature.
1. molality
2. normality
3. none of these
4. molarity
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