Chemical Engineering - Chemical Process

21. 

Pure rectified spirit contains about __________ percent alcohol.

A. 45
B. 70
C. 95
D. 99.5

Answer: Option C

Explanation:

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22. 

Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.

A. -83
B. -183
C. -196
D. -218

Answer: Option B

Explanation:

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23. 

Titanium dioxide is a/an __________ colour pigment.

A. white
B. black
C. yellow
D. blue

Answer: Option A

Explanation:

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24. 

Mercury cells for caustic soda manufacture, compared to diaphragm cells

A. require lower initial investment.
B. require more power.
C. produce lower concentration NaOH.
D. none of these.

Answer: Option D

Explanation:

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25. 

Cellulose percentage in bamboo fibre is about

A. 10
B. 20
C. 50
D. 85

Answer: Option C

Explanation:

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