Which one is a double displacement reaction?

$B a C l_{2} + N a_{2} S O_{4} \to B a S O_{4} + 2 N a C l$

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$C a O + H_{2} O \to C a (O H)_{2}$

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$2 P b (N O_{3})_{2} \to 2 P b O + 4 N O_{2} + O_{2}$

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$Z n + 2 A g N O_{3} \to Z n (N O_{3})_{2} + 2 A g$

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Solution

The correct option is A
$B a C l_{2} + N a_{2} S O_{4} \to B a S O_{4} + 2 N a C l$

Double displacement reaction is a type of reaction in which two reactant exchange ions to form new compounds.

Double displacement reaction $A B + C D \to A D + C B$ . In the above case, there is an exchange of cation and anion.Chloride is replaced by sulphate of sodium sulphate and chloride is place in place of sulphate.

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Similar questions

Z n + 2 A g N O_{3} \to 2 A g + Z n (N O_{3})_{2}

2 A g N O_{3} + C u \to C u (N O_{3})_{2} + 2 A g ↓

C a C O_{3} \to C a O + C O_{2} ↑

2 A g N O_{3} + C u \to C u {(N O_{3})}_{2} + 2 A g ↓

2 S O_{2} + O_{2} \to 2 S O_{3} ↑

N a C l + A g N O_{3} \to A g C l ↓ + N a N O_{3}

Classify each of the following reactions as combination, decomposition, displacement or double displacement reaction. [5 MARKS]

P b + C u C l_{2} \to P b C l_{2} + C u

N a_{2} S O_{4} + B a C l_{2} \to B a S O_{4} + 2 N a C l

C + O_{2} \to C O_{2}

C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O

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