Question

which of the following is a combination reaction and which is a displacement reaction

1) cl2 +2kl -----> 2kcl+l2

2) 2k +cl2 ----> 2kcl

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Answer 1

1 is displacement as more reactive Cl displace less reactive I
2 is combination or addition reaction as the 2 reactant form an single product

Answer 2

1 one is displacement recation
2 one is combination recation