Question

Which of the following is a synthesis reaction?

AgNO3 + NaCl → AgCl + NaNO3
CH4 + O2 → CO2 + H2O
SO3 + H2O → H2SO4
Cu + AgNO3 → Ag + CuNO3

Answer 1

SO3 + H2O => H2SO4

Step-by-step explanation:

I took the test :)

Answer 2

Synthesis reaction

It is a reaction in which 2 or more reactants combine with each other to form one product .

Check option C

Sulphate and water are combining to form sulfuric acid .

Hence option C is correct