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Stoichiometry
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Question
The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol
X
M
satisfies
Options
A.
X
M
< 0.5
B.
X
M
= 0.5
C. 0.5 <
X
M
< 0.64
D.
X
M
? 0.64
Correct Answer
X
M
? 0.64
More questions
1. Refractoriness of a typical silica brick corresponds to Segar cone number, '32', which is equivalent to a temperature of __________ °C.
Options
A. 1380
B. 1520
C. 1710
D. 1915
Show Answer
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Discuss
Correct Answer: 1710
2. Higher viscosity of lubricating oil usually signifies
Options
A. lower Reid vapour pressure.
B. higher acid number.
C. higher flash point and fire point.
D. lower flash point and fire point.
Show Answer
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Discuss
Correct Answer: higher flash point and fire point.
3. Lap joints are preferred for plates having thickness __________ mm.
Options
A. < 12.5
B. > 3
C. > 5
D. 5-10
Show Answer
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Discuss
Correct Answer: > 3
4. Combustion of fuel in a furnace with oxygen enriched air results in higher
Options
A. flue gas volume
B. flame temperature
C. fuel consumption
D. stack loss
Show Answer
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Discuss
Correct Answer: flame temperature
5. Which of the following has the lowest viscosity (at a given temperature) of all?
Options
A. Naphtha
B. Kerosene
C. Diesel
D. Lube oil
Show Answer
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Discuss
Correct Answer: Naphtha
6. Which of the following is not used as a medium for high temperature heating?
Options
A. Dowtherm
B. mercury
C. liquid metal (e.g. molten sodium)
D. fused salts (e.g., an eutectic mixture of 53% KNO
3
, 40% NaNO
2
and 7% NaNO
3
)
Show Answer
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Discuss
Correct Answer: mercury
7. Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex?
Options
A. Ammonium alum
B. Potassium alum
C. both a & b
D. neither a nor b
Show Answer
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Discuss
Correct Answer: both a & b
8. The main use of butadiene is
Options
A. as a plasticiser for unsaturated polyester.
B. in the manufacture of synthetic rubber.
C. as an anti-skimming agent in paint.
D. none of these.
Show Answer
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Correct Answer: in the manufacture of synthetic rubber.
9. Which is a regenerative furnace?
Options
A. Coke oven heating chamber.
B. Open hearth furnace.
C. Both (a) and (b).
D. Neither (a) nor (b).
Show Answer
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Correct Answer: Both (a) and (b).
10. Cost of piping in a fluid processing unit (e.g., distillation) of a chemical process plant is about __________ percent of the fixed capital investment.
Options
A. 4
B. 13
C. 22
D. 34
Show Answer
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Discuss
Correct Answer: 13
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