Practice Test: Question Set - 19
1. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is
- (A) Less than 100°C
- (B) 100°C
- (C) Between 100 and 110°C
- (D) 110.6°C
2. A flowsheet is given in the following figure: If the single pass once through conversion of A to B is 20%, then the rate of recycle R (molds/hr) is
- (A) 300
- (B) 400
- (C) 500
- (D) 600
3. At 100°C, water and methylcyclohexane both have vapor pressures of 1 atm. Also at 100°C, the latent heats of vaporization of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapor pressure of water at 150°C is 4.69 atm. At 150°C, the vapor pressure of methylcyclohexane would be expected to be
- (A) Significantly less than 4.69 atm
- (B) Nearly equal to 4.69 atm
- (C) Significantly more than 4.69 atm
- (D) Indeterminate due to lack of data
4. If pH value of a solution is 8, then its pOH value will be
- (A) 6
- (B) 1
- (C) 7
- (D) 10
5. In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is
- (A) Independent of temperature
- (B) Increases with rise in pressure
- (C) Increased with decrease in pressure
- (D) Unchanged with pressure changes
6. The equilibrium data of component A in the two phases B and C are given below. The estimate of Y for X = 4 by fitting a quadratic expression of a form Y = mX2 for the above data is
- (A) 15.5
- (B) 16
- (C) 16.5
- (D) 17
7. 1 ata is equivalent to
- (A) 1 atm
- (B) 10 torr
- (C) 0.98 Pascal
- (D) 1 kgf/cm2
8. S.T.P. corresponds to
- (A) 1 atm. absolute pressure & 15.5°C
- (B) 760 mm Hg gauge pressure & 15.5°C
- (C) 760 torr & 0°C
- (D) 101.325 kPa gauge pressure & 15.5°C
9. In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.
- (A) Kg of solute/kg of solvent
- (B) Kg-mole of solute/kg-mole of solvent
- (C) Kg-mole of solute/1000 kg of solvent
- (D) All (a), (b) & (c)
10. In general, the specific heats of aqueous solutions __________ with increase in the concentration of the solute.
- (A) Increase
- (B) Decrease
- (C) Remain unchanged
- (D) None of these
11. The value of gas constant 'R' is __________ kcal/kg.mole.°C.
- (A) 2.79
- (B) 1.987
- (C) 3.99
- (D) None of these
12. The chemical nature of an element is independent of
- (A) Its atomic number
- (B) The number of protons or electrons present in it
- (C) The number of neutrons present in it
- (D) None of these
13. Vapor pressure of a solution is proportional to (where, Sv and St are mole fraction of solvent and solute respectively).
- (A) Sv
- (B) 1/St
- (C) St
- (D) 1/Sv
14. For most salts, the solubility increases with rise in temperature, but the solubility of __________ is nearly independent of temperature rise.
- (A) Sodium chloride
- (B) Sodium carbonate monohydrate
- (C) Anhydrous sodium sulphate
- (D) Hypo
15. "The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements." This is the statement of
- (A) Law of Petit and Dulong
- (B) Kopp's rule
- (C) Nernst heat theorem
- (D) Trouton's rule
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