Stoichiometry Questions with Solutions - Set 15 - ObjectiveBooks

# Practice Test: Question Set - 15

1. N.T.P. corresponds to
(A) 1 atm absolute pressure & 0°C
(B) 760 mm Hg gauge pressure & 0°C
(C) 760 torr & 15°C
(D) 101.325 KPa gauge pressure & 0°C

2. Which equation is not an equation of state?
(A) PV = RT + B/V + y/V2 + ....
(B) (P + a/V2)(V-b) = RT
(C) loge (p/p0) = (λ/R) (1/T0 - 1/T)
(D) p = [RT/(V - b)] - (a/TV2)

3. Pick out the wrong statement.
(A) The effect of pressure on heat capacity of gases at pressure above one atmosphere and above the critical temperature is negligible
(B) The value of Cp of gases increases with increase in pressure, above atmospheric pressure
(C) The value of Cp at critical temperature and pressure reaches infinity
(D) All (a), (b), and (c)

4. Avogadro number is the number of molecules in one _________ of a gas.
(A) gram
(B) Kilogram
(C) gm.mole
(D) Liter

5. A chemical process is said to occur under unsteady state, if the
(A) Inventory changes do not take place
(B) Ratio of streams entering/leaving are independent of time
(C) Flow rates & composition both are time dependent
(D) None of these

6. A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is
(A) 2
(B) 1
(C) 0.5
(D) 0.05

7. The vapor pressure of liquids of similar chemical nature at any particular temperature ________ with increase in the molecular weight.
(A) Increases
(B) Decreases
(C) Remains unchanged
(D) Either (a) or (b); depends on the liquid

8. 1 BTU/ft3 is approximately equal to ________ kcal/m3.
(A) 1
(B) 9
(C) 4
(D) 252

9. Heat of solution in a system in which both solute and solvent are liquids is termed as
(A) Heat of solvation
(B) Heat of hydration
(C) Standard integral heat of solution
(D) Heat of mixing

10. The heat of adsorption of a gas caused by Van der Waals forces of attraction and capillarity is equal to the heat of
(A) Normal condensation
(B) Wetting
(C) Sum of (a) and (b)
(D) Difference of (a) and (b)

11. Pick out the wrong unit conversion of mass transfer co-efficient.
(A) 1 lb/hr.ft3.atm. = 4.8182 kg/hr.m2.bar
(B) 1 kg/hr.m2.atm= 0.98687 kg/hr. m .bar
(C) 1 lb/hr.ft2 = 4.8823 kg/hr.m2
(D) 1 kg/hr.m2 = 4.8823 lb/hr.ft2

12. Which of the following is not a unit of pressure?
(A) Torr
(B) Newton/m2
(C) Parsec
(D) Ata, bar or Pascal

13. 1 Pascal (unit of pressure) is equal to ________ N/m2.
(A) 10
(B) 1
(C) 0.1
(D) 1000

14. Pick out the wrong statement:
(A) A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure
(B) A vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a 'superheated vapor'
(C) The temperature at which a vapor is saturated is termed as the boiling point
(D) The difference between the existing temperature of a vapor and its saturation temperature (i.e. dew point) is called its 'degree of superheat'

15. Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263°C and 2 atm.
(A) 1
(B) 2
(C) 3
(D) 4

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