The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by_________________?

Question: Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
[A].

slaked lime

[B].

soda lime

[C].

calcium perchlorate

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Bromine is used in the preparation of
[A].

fire extinguishing compounds.

[B].

fire proofing agents.

[C].

dyes and antiknock compounds.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Air used in aerobic fermentation must be sterilized, otherwise the
[A].

recovery of product will be difficult.

[B].

contamination of pure culture would result.

[C].

uniformity of product cannot be achieved.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: More than 100 percent of __________ is present in oleum.
[A].

SO3

[B].

H2SO4

[C].

H2SO3

[D].

SO2

Answer: Option B

Explanation:

No answer description available for this question.