Which of the following is not responsible for causing permanent hardness of water ?

Question: Yellow phosphorus is transported under
[A].

air

[B].

water

[C].

nitrogen

[D].

helium

Answer: Option B

Explanation:

No answer description available for this question.

Question: CaCl(OCl) is the chemical formula of
[A].

hypo

[B].

bleaching powder

[C].

plaster of paris

[D].

aqua regia

Answer: Option B

Explanation:

No answer description available for this question.

Question: Alum is commercially produced from
[A].

gypsum

[B].

feldspar

[C].

galena

[D].

bauxite

Answer: Option D

Explanation:

No answer description available for this question.

Question: Iron ore hametite is concentrated using
[A].

electro magnetic separation mainly.

[B].

gravity separation.

[C].

froth floatation.

[D].

roasting.

Answer: Option B

Explanation:

No answer description available for this question.