Chemical Process MCQ Questions & Answers

91

Alcohol percentage in molasses may be around

A) 10 B) 40 C) 70 D) 85

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Answer & Solution

Answer: Option B

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92

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

A) Poor oxidation stability and high gum forming tendency B) Greater tendency of decomposition at elevated temperature C) Hydrolysis tendency in presence of water D) All of the above

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Answer & Solution

Answer: Option D

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93

Triple superphosphate is manufactured by reacting

A) Phosphate rock with phosphoric acid B) Phosphate rock with sulphuric acid C) Phosphate rock with nitric acid D) Ammonium phosphate with phosphoric acid

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Answer & Solution

Answer: Option A

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94

Teflon is

A) Phenol formaldehyde B) An inorganic polymer C) Poly tetrafluoroethylene (P.T.F.E.) D) A monomer

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Answer & Solution

Answer: Option C

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95

In sulphate pulp manufacture, the pressure and temperature in the digestor is

A) 10 atm., 800 °C B) 10 atm., 170-180°C C) 1 atm., 170 - 180°C D) L atm., 800°C

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Answer & Solution

Answer: Option B

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96

Drinking (potable) water treatment does not involve

A) Coagulation B) Sedimentation C) Softening D) Disinfection

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Answer & Solution

Answer: Option C

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97

Esterification reaction produces

A) Detergent B) Vanaspati C) Soap D) Mercaptans

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Answer & Solution

Answer: Option C

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98

Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.

A) Hard B) Soft C) Metallic D) Lubricating

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Answer & Solution

Answer: Option A

Solution:

Sodium salts of higher molecular weight fatty acids are commonly known as hard soaps.
These soaps are formed when a fat or oil is treated with sodium hydroxide (NaOH) during the saponification process.

The sodium salts produced are solid in nature and have a relatively high melting point.
They are called hard soaps because they are less soluble in water and are typically used for washing and cleaning purposes.

In contrast, when potassium hydroxide (KOH) is used instead of NaOH, the resulting potassium salts of fatty acids are soft soaps, which are more soluble in water.

Hence, the sodium salt of higher molecular weight fatty acid is termed as the hard soap.

99

Terylene is

A) Same as dacron B) A polyester C) Both A & B D) Neither A nor B

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Answer & Solution

Answer: Option C

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100

The chamber process is

A) Preferred over contact process for producing 98 to 100% H₂SO₄ and various oleums B) Non-catalytic and operates only on pyrites C) A batch process for directly producing high strength (98 to 100%) H₂SO₄ D) None of these

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Answer: Option D

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Chemical Process MCQ Questions & Answers | Chemical Engineering