Chemical Engineering - Chemical Process

11. 

Electric bulbs are made of __________ glass.

A. jena
B. flint
C. crookes
D. pyrex

Answer: Option B

Explanation:

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12. 

Which of the following is used as a binding material in soap to improve soap texture ?

A. Rosin
B. Borax
C. Benzyl acetate
D. Sodium carbonate

Answer: Option B

Explanation:

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13. 

An alkali metal salt of palmitic acid is known as

A. soap
B. metallic soap
C. detergent
D. alkaloid

Answer: Option B

Explanation:

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14. 

Washing soda is chemically represented by

A. Na2CO3
B. Na2CO3.H2O
C. Na2CO3.10H2O
D. NaHCO3

Answer: Option C

Explanation:

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15. 

Magnesium and calcium __________ cause temporary hardness of water.

A. carbonates
B. bicarbonates
C. phosphates
D. sulphates

Answer: Option B

Explanation:

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