Identify the characteristics of a precipitation reaction:

Insoluble solid is formed

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generally proceed via double displacement reaction

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colored solid is formed

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both a and b

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Solution

The correct option is D both a and b
A reaction in which an insoluble solid (solid precipitate) is formed is called a precipitation reaction.
For example:
$N a_{2} C O_{3} (a q) S o d i u m c a r b o n a t e + C a C l_{2} (a q) C a l c i u m c h l o r i d e \to C a C O_{3} (s) C a l c i u m c a r b o n a t e + 2 N a C l (a q) S o d i u m c h l o r i d e$
In this reaction, calcium carbonate is obtained as a precipitate. Hence, it is a precipitation reaction.
Another example of precipitation reaction is :
$N a_{2} S O_{4} (a q) S o d i u m s u l p h a t e + B a C l_{2} (a q) B a r i u m c h l o r i d e \to B a S O_{4} (s) B a r i u m s u l p h a t e + 2 N a C l (a q) S o d i u m c h l o r i d e$
In this reaction, barium sulphate is obtained as a precipitate.

Suggest Corrections

Similar questions

Salts are prepared by the following methods

(a) Direct combination

(b) Displacement

(d) Neutralisation of insoluble base

(e) Neutralisation of an alkali (titration)

$A g N O_{3 (a q)} + N a C l_{(a q)} \to A g C l_{(s)} + N a N O_{3 (a q)}$ .
Above reaction is a:

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