Single Choice

In paper industry, the chemical compound used for bleaching is :

APotasium sulphite
BCalcium sulphate
CSulphuric acid
DCalcium bisulphite
Correct Answer

Solution

In paper industry, the chemical compound used for bleaching is calcium bisulphite. Because metallic sulphites show strong bleaching action.

SIMILAR QUESTIONS

p - block Elements

The reaction between $$H_{2}$$ and $$Cl_{2}$$ in direct sun light is explosive.

p - block Elements

Chlorine gas bleaches moist litmus paper.

p - block Elements

Yellow color of chlorine water fades because of?

p - block Elements

A black powder when heated with conc. HCl gives a greenish yellow gas. The gas acts as an oxidizing and a bleaching agent. When it is passed over slaked lime, a white powder is formed which is a ready source of gas. The black powder and white powder respectively are:

p - block Elements

Account for the following: Bleaching of flowers by chlorine is permanent while that by sulphur dioxide is temporary.

p - block Elements

Account for the following: a. $$BiH_{3}$$ is the strongest reducing agent in Group $$15$$ elements hydrides. b. $$Cl_{2}$$ acts as a bleaching agent. c. Noble gases have very low boiling points.

p - block Elements

On heating with bleaching powder, ethyl alcohol is converted into:

p - block Elements

Bleaching powder is insoluble in cold water.

p - block Elements

Bleaching action of chlorine is by:

p - block Elements

Bleaching powder is prepared from:

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