Stoichiometry Multiple Choice Questions and Answers - Set 01 - ObjectiveBooks

# Practice Test: Question Set - 01

1. In the reaction, Ca + 2H2O = Ca(OH)2 + H2; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water ? (Atomic weight of calcium = 40).
(A) 4480
(B) 2240
(C) 1120
(D) 0.4

2. A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
(A) Saturated
(B) Supersaturated
(C) Superheated
(D) None of these

3. Dissolving a solute in a solvent does not change its
(A) Specific heat
(B) Vapor pressure
(C) Viscosity
(D) None of these

4. Applicability of Clausius-Clapeyron Equation is subject to the condition that the
(A) Vapor follows ideal gas law
(B) Volume in the liquid state is negligible
(C) Both (a) & (b)
(D) Neither (a) nor (b)

5. 'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the
(A) Temperature vs. log (vapor pressure)
(B) Vapor pressure vs. log (temperature)
(C) Log (temperature) vs. log (vapor pressure)
(D) Vapor pressure vs. temperature

6. The reaction A + B → C has been conducted in a reactor as shown below. The number of boundaries around which material balance can be written, are
(A) 1
(B) 6
(C) 3
(D) 4

7. Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The number of additional specifications required to determine the product flow rate and composition is
(A) 0
(B) 1
(C) 2
(D) 3

8. The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 × __________.
(A) 1026
(B) 1023
(C) 1020
(D) 1019

9. Concentration of a solution expressed in terms of ____________ is independent of temperature.
(A) Molarity
(B) Normality
(C) Molality
(D) None of these

10. The amount of Zn (atomic weight = 65) required to form 224 c.c. of H2 at N.T.P. on treatment with dilute H2SOwill be __________ gm.
(A) 0.065
(B) 0.65
(C) 6.5
(D) 65

11. Pick out the correct conversion.
(A) 1 BTU = 453.6 calories
(B) 1 BTU = 252 calories
(C) 1 calorie = 252 BTU
(D) 1 calorie = 453.6 BTU

12. A vapor that exists above its critical temperature is termed as a __________ vapor.
(A) Saturated
(B) Unsaturated
(C) Gaseous
(D) Sub-cooled

13. Othmer chart is useful in estimating the heat of
(A) Mixing
(B) Wetting
(D) None of these

14. Pick out the wrong unit conversion of temperature.
(A) °R = 273 + °F
(B) Temperature difference of 1°K = 1°C = 9/5°F
(C) °C = (F- 32) × 0.555
(D) °F = (°C + 17.778) × 1.8

15. Pick out the wrong unit conversion of heat transfer rate.
(A) 1 kcal/hr= 1.163 Watt
(B) 1 Watt = 1.163 kcal/hr
(C) 1 BTU/ft2.hr = 2.712 kcal/m2.hr
(D) 1 kcal/m2.hr = 0.3687 BTU/ft2.hr = 1.163 Watt/m2

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