Chemical Process

Question: Bleaching of paper pulp is done with
[A].

activated clay

[B].

bromine

[C].

chlorine or chlorine dioxide

[D].

magnesium sulphite

Answer: Option C

Explanation:

No answer description available for this question.

Question: Cooking liquor in case of sulphite process is
[A].

sodium sulphite and sodium bisulphite.

[B].

magnesium sulphite and free SO2 in acid medium.

[C].

magnesium sulphate and magnessium bicarbonate.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Comparing sulphate process with sulphite process, we find that __________ in the later.
[A].

both temperature & pressure in the former is less than that

[B].

both temperature & pressure in the former is more than that

[C].

temperature is more in the former whereas pressure is more

[D].

pressure is more in the former whereas temperature is less

Answer: Option B

Explanation:

No answer description available for this question.

Question: In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
[A].

sodium sulphide & sodium carbonate.

[B].

sodium sulphite & sodium carbonate.

[C].

sodium sulphite & sodium sulphide.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Molasses is the starting material for the production of
[A].

alcohol

[B].

essential oil

[C].

fatty acids

[D].

massecuite

Answer: Option A

Explanation:

No answer description available for this question.

Question: Enamels
[A].

give good glossy finish.

[B].

are same as varnish.

[C].

are prepared from non-drying oil.

[D].

do not contain pigment.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Function of thinner in a paint is to
[A].

accelerate the oxidation of oil.

[B].

prevent gelling of the paint.

[C].

suspend pigments & dissolve film forming materials.

[D].

form a protective film.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Essential oils are usually obtained using
[A].

steam distillation

[B].

extractive distillation

[C].

solvent extraction

[D].

leaching

Answer: Option D

Explanation:

No answer description available for this question.

Question: Yellow glycerine is made into white, using
[A].

activated carbon

[B].

diatomaceous earth

[C].

bauxite

[D].

bentonite

Answer: Option A

Explanation:

No answer description available for this question.

Question: Bio-degradable detergents
[A].

can be readily oxidised.

[B].

pose problem in sewerage plant.

[C].

have an isoparaffinic structure.

[D].

should not be used as it spoils the cloth.

Answer: Option A

Explanation:

No answer description available for this question.