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chemical engineering stoichiometry MCQs

Practise multiple-choice questions from chemical engineering stoichiometry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering stoichiometry Mcqs

1. A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is_________________?
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A. None of these

B. N2O4

C. N2O3

D. N2O5

2. Thermal conductivity of refractory bricks____________________?
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A. Is independent of its porosity and is maximum for insulating bricks

B. Increases with decrease in porosity

C. Decreases with decreases in porosity

D. Increases with the amount of air entrapped in pores

3. Which property of refractories is the most important for top section of the blast furnace ?
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A. Resistance to slag penetration

B. Stability of volume at high temperature

C. Resistance to abrasion

4. Raoults law is obeyed by a _____________ solution?
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A. Saturated

B. Molar

C. Normal

D. None of these

5. In physical adsorption, as compared to chemisorption, the________________________?
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A. Quantity adsorbed per unit mass is higher

B. Rate of adsorption is controlled by the resistance to surface reaction

C. Activation energy is very high

D. Heat of adsorption is very large

6. The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the___________________?
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A. Kistyakowsky equation

B. Kopps rule

C. Antoine equation

D. Troutons rule

7. A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16) ?
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A. 140

B. 345

C. 350

D. 485

8. In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality ?
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A. Fugacity co-efficient

B. Activity co-efficient

C. None of these

D. Use of equation of state

9. The maximum adiabatic flame temperature of fuels in air is ____________ the maximum flame temperature in pure oxygen?
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A. Lower than

B. Higher than

C. Same as

D. Not related to

10. One of the specific gravity scales is Brix (used specifically for sugar solution). It is defined as ______________?
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A. Brix = (400/G) 400

B. Brix = 145 (145/G)

C. Brix = 200 (G-1)

D. None of these

11. Pick out the wrong unit conversion of heat transfer rate?
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A. 1 kcal/hr= 1.163 Watt

B. 1 kcal/m2.hr = 0.3687 BTU/ft2.hr = 1.163 Watt/m2

C. 1 Watt = 1.163 kcal/hr

D. 1 BTU/ft2.hr = 2.712 kcal/m2.hr

12. Isotonic solutions must have the same__________________?
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A. Normality

B. Critical temperature

C. Molar concentration

D. Viscosity

13. Viscosity of atmospheric air may be about _____________ centipoise?
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A. 0.015

B. 150

C. 1.5

D. 15

14. Fireclay bricks are used in the______________?
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A. Coke ovens regenerator

B. Coke oven walls

C. Outer lining of L.D. converter

D. Hearth bottom of blast furnace

15. On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes_________________?
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A. 8

B. 2

C. 4

D. 1

16. The hydroxyl ion (OH-) concentration in a solution having pH value 3 will be_________________?
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A. 3-Oct

B. 10-Oct

C. 4-Oct

D. 10-11

17. The number of H+ in 1 c.c solution of pH 13 is__________________?
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A. 6.023 1013

B. 6.023 107

C. 1013

D. 6.023 1010

18. Fireclay bricks are not used in the_________________?
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A. Wall of coke oven

B. Hot blast stove

C. Blast furnace

D. Cupola

19. Kinematic viscosity of 1 m2 /second is equivalent to _____________ stokes?
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A. 10

B. 103

C. 104

D. 102

20. The rate of material _____________ is zero in case of a steady state system?
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A. Generation

B. Accumulation

C. Production

D. Input

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