Question

chapter :chemical reaction and equation ​

Answer 1

1. last option is not double displacement...

CaO+CO2--->CaCO3

2.CuSO4+Fe-->FeSO4+Cu is a displacement reaction

3.NaOH+Hcl-->Nacl+H20 is a double displacement reaction

4.Zn displaces copper from coppersulphate solution as it is more reactive...

last question is not clear

next time pls ask with a clear photo..we cant see it clearly...

hope this helps you...

mark me brainliest pls...

Answer 2

Answer:

A chemical reaction is described by a chemical equation, an expression that gives the identities and quantities of the substances involved in a reaction. A chemical equation shows the starting compound(s)—the reactants—on the left and the final compound(s)—the products—on the right, separated by an arrow.