BaC l 2 (aq)+N a 2 S O 4 (aq)→BaS O 4 (s)+2NaCl (aq) The above reaction involves which type of reaction: a) Displacement b) Precipitation c) Combination d) Double displacement

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$B a C l 2 (a q) + N a 2 S O 4 (a q) → B a S O 4 (s) + 2 N a C l (a q)$

The above reaction involves which type of reaction:

a) Displacement

b) Precipitation

c) Combination

d) Double displacement

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(a) & (b)

(a), (b) & (c)

(b) & (c)

(b) & (d)

answer is D.

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Detailed Solution

Concept: In the given reaction,

B a C l 2 (a q) + N a 2 S O 4 (a q) → B a S O 4 (s) + 2 N a C l (a q)

The barium ion displaces the sodium ion and forms barium sulphate and the sodium ion displaces the barium ion and forms sodium chloride. So, the reaction is showing a double displacement phenomenon. As the barium sulphate is formed in solid form as a precipitate. So, it is a precipitation reaction too.
A displacement reaction is a chemical reaction in which a more reactive element removes a less reactive element from its aqueous salt solution. This can also be said as a substitution reaction.
When two or more reactants combine to produce a single product, it is called a combination reaction.
Hence, the correct answer is option 4.

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