Question

which reaction results in the formation of water?
a. 2h₂o → 2h₂ + o₂
b. zn + cuso₄ → znso₄ + cu
c. 2h₂ + o₂ → 2h₂o
d. nacl + agno₃ → nano₃ + agcl

Explanation:

Step1: Analyze option a

It is the decomposition of water, not formation.

Step2: Analyze option b

It is a single - displacement reaction, no water formed.

Step3: Analyze option c

Hydrogen and oxygen combine to form water.

Step4: Analyze option d

It is a double - displacement reaction, no water formed.

Answer:

C. $2H_2 + O_2
ightarrow2H_2O$