Q.

2 NaCl + CaSO4​  → Na2​SO4​ + CaCl2 is an example of __________ reaction.

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a

Combination reaction

b

Displacement reaction

c

Decomposition reaction

d

Double displacement reaction

answer is C.

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Detailed Solution

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  • Double displacement reactions are those in which two chemical substances react by exchanging ions to produce two new molecules.
  • In the reaction 2 NaCl + CaSO4​  → Na2​SO4​ + CaCl2, Cl and SO42- ions are exchanged and so it is an example of a double displacement reaction.

 

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