Subjective Type

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.

Solution

(a) On moving down the group atomic size increases, therefore, $$E-H$$ bond strength decreases. Thus, $$Bi-H$$ bond is the weakest amongst the hydrides of group $$15$$ and hence $$BiH_{3}$$ is the strongest reducing agent.

(b) In the presence of moisture or in aqueous solution, $$Cl_{2}$$ liberates nascent oxygen
$$Cl_{2} + H_{2}O \rightarrow 2HCl + [O]$$
The bleaching action of $$Cl_{2}$$ is due to oxidation which is permanent.
Coloured substance $$+ [O] \rightarrow$$ Colourless substance

(c) Noble gases being monoatomic have no interatomic forces except weak dispersion forces and therefore they have very low boiling points.

SIMILAR QUESTIONS

p - block Elements

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

p - block Elements

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

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

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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