Question 41 : The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be
1. basic
2. neutral
3. of the same acidity
4. more acidic
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Question 42 : Which of the following ratios defines the recycle ratio in a chemical process ?
1. None of these
2. Gross feed stream/recycle feed stream
3. Recycle stream/gross feed stream
4. Recycle stream/fresh feed stream
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Question 43 : At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 355 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be
1. significantly less than 69 atm.
2. significantly more than 69 atm.
3. nearly equal to 69 atm.
4. indeterminate due to lack of data
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Question 44 : For estimation of heat capacity of a solid compound, one can use
1. Gibb's equation
2. Clayperon's equation
3. Kopp's rule
4. Trouton's rule
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Question 45 : NaOH contains __________ percent oxygen.
1. 1
2. 20
3. 10
4. 40
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Question 46 : With increase in the temperature of pure (distilled) water, its
1. pH and pOH both increases.
2. pOH decreases and pH increases.
3. pOH and pH both 4ecreases.
4. pH decreases and pOH increases.
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Question 47 : 1 torr is equal to __________ mm Hg column.
1. 1000
2. 10
3. 1
4. 100
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Question 48 : Validity of the relationship, inputs = outputs, holds good for the system at steady state
1. without chemical reaction.
2. without chemical reaction & losses.
3. with chemical reaction.
4. none of these.
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Question 49 : The vapor pressures of benzene and toluene are 3 and 4/3 atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vapourised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is
1. 0.8
2. 0.4
3. 0.2
4. 0.6
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Question 50 : Isotonic solutions must have the same
1. normality
2. molar concentration
3. critical temperature
4. viscosity
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