Question

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Answer 1

Answer:

1)Displacement

2)Double Displacement

3)combination

4)displacement

Answer 2

Explanation:

In first reaction both are been displace

therfore, first is double displacement reaction

ch4+2o2 = co2 + 2h2o

similarily second is also double displacement

2pb(no3) +2kI = 2pbi + 2kno3

third is an combination/combustion reaction

cao + h2o = ca(oh)2

fourth is single displacement reaction

cuso4 + zn = znso4 + cu