Question

Question 5 of 10

Which chemical equation represents a redox reaction?

A.
Na2CO3 + H2S → H2CO3 + NaS

B.
2Li + MgCl2 → 2LiCl + Mg

C.
AgNO3 + NaCl → AgCl + NaNO3

D.
Ca(OH)2 + H2SO4 → CaSO4 + 2H2O

Answer 1

Chemical equation represents a redox reaction :

2Li + MgCl₂ → 2LiCl + Mg

Further explanation

The oxidation-reduction reaction or abbreviated as Redox is a chemical reaction in which there is a change in oxidation number

Reaction

2Li + MgCl₂ → 2LiCl + Mg

Oxidation is an increase in oxidation number, while reduction is a decrease in oxidation number.

Oxidation

`\tt Li\rightarrow Li^+(0~to~+1)`

Reduction

`\tt Mg^(+2)\rightarrow Mg(+2~to~0)`