Chemical Engineering Objective Questions { Chemical Process }

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1. Presence of carbonaceous matter in the sewage

A. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures

B. Reduces sulphate ions to sulphides causing obnoxious smell

C. Increases the quantity of chlorine used for its purification

D. All of the above

2. Sea water contains about __________ ppm of bromine.

3. Tall oil obtained as a by-product from the black liquor recovery is

A. A black, sticky & viscous liquid

B. Used in the manufacture of greases, emulsions & soaps

C. Composed mainly of rosin & fatty acids

D. All of the above

4. Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of

B. Hydrochloric acid

C. Methyl alcohol

5. Antibiotic . . . . . . . .

A. Inhibits/destroys the growth of microorganisms

B. Is used as a pain reliever

C. Is an antimalarial

D. Is an anaesthetic

6. Pick out the correct statement.

A. A fat is converted into oil by its hydrogenation

B. There is no difference between a fat and an oil so far as its physical properties are concerned

C. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms

D. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content

7. Rosin soap is added during paper manufacture to

A. Impart adhesive properties

B. Improve opacity

C. Impart resistance to penetration by liquids

D. None of these

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