Which one of the following is a redox reaction? . 2 na(g) + cl2(g) 2 nacl(s) a. k2cr2o7(aq) + 2 koh(aq) 2 k2cro4(aq) + h2o(l) b. h2o(l) h+(aq) + oh -(aq) c. na2co3(s) + 2 hcl(aq) 2 nacl(aq) + co2(g) + h2o(l) d. ba2+(aq) + so42-(aq) baso4(s)

Option (a) is the correct answer.

Explanation:

A redox reaction is defined as a reaction in which there occurs a change in oxidation state of the reacting species.

For example,

Here, oxidation state of sodium is changing from 0 to +1 and oxidation state of chlorine is changing from 0 to -1.

Therefore, this change in oxidation state of the reactants depicts a redox reaction has occurred.

Thus, we can conclude that out of the given options is a redox reaction.

sorry idk the answer well to you i have a explaination

explanation: a formula which shows the arrangement of atoms in the molecule of a compound

a