Chemical Process

Question: Baking soda is chemically represented by
[A].

Na2CO3

[B].

NaHCO3

[C].

Na2CO3.H2O

[D].

Na2CO3.10H2O

Answer: Option B

Explanation:

No answer description available for this question.

Question: Le-Blanc process is a primitive process for the manufacture of
[A].

caustic soda

[B].

soda ash

[C].

bromine from sea water

[D].

hydrochloric acid

Answer: Option B

Explanation:

No answer description available for this question.

Question: During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to
[A].

increase the rate of absorption.

[B].

avoid corrosion.

[C].

reduce the cooling water circulation rate.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Nicotine is
[A].

a volatile alkaloid.

[B].

obtained by treating by-products of the tobacco processing industry.

[C].

both (a) and (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: Parathion and Malathion are
[A].

pesticides.

[B].

plasticisers for unsaturated polysters.

[C].

pain-relieving drugs (analgesic).

[D].

tranquilisers.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Margarine is a/an
[A].

fat

[B].

explosive

[C].

plasticiser

[D].

rocket propellant

Answer: Option A

Explanation:

No answer description available for this question.

Question: Fusel oil is a/an
[A].

essential oil.

[B].

extract from medicinal herbs.

[C].

mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Fourdrinier machine is used in the manufacture of
[A].

sugar

[B].

paper

[C].

alcohol from molasses

[D].

phenol formaldehyde

Answer: Option B

Explanation:

No answer description available for this question.

Question: Permanent hardness of water can be removed by
[A].

simply boiling.

[B].

adding alum.

[C].

passing it through cation & anion exchangers.

[D].

all (a), (b) and (c).

Answer: Option C

Explanation:

No answer description available for this question.

Question: Most widely and commonly used coagulant for the removal of suspended impurities in water is
[A].

bleaching powder

[B].

slaked lime

[C].

alum

[D].

copper sulphate

Answer: Option C

Explanation:

No answer description available for this question.