Stoichiometry Multiple Choice Questions and Answers - Set 01

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
Practice set 01 - Question No. 06
    (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
    (C) Adsorption
    (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/ = 2.712 kcal/
    (D) 1 kcal/ = 0.3687 BTU/ = 1.163 Watt/m2

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