Question

一.单选题(共20题,共40分)
6.the following chemicals except( ) should avoid contact with acetic acid. (2分)
oa nitric acid
ob. peroxide
oc water
od. permanganate

Explanation:

Step1: Analyze the reactivity of each option with acetic acid

• Option A: Nitric acid

Nitric acid (\(HNO_3\)) is a strong oxidizing agent. Acetic acid (\(CH_3COOH\)) is a weak organic acid. There is no significant chemical reaction between them under normal conditions.

• Option B: Peroxide

Peroxides (e.g., hydrogen peroxide \(H_2O_2\)) can react with acetic acid. For example, in the presence of a catalyst, they can form peracetic acid (\(CH_3COOOH\)), which is a strong oxidizing and disinfecting agent. The reaction is \(CH_3COOH + H_2O_2
ightleftharpoons CH_3COOOH + H_2O\)

• Option C: Water

Acetic acid is miscible with water. They form a homogeneous solution through hydrogen - bonding interactions. There is no chemical reaction in the sense of bond - breaking and new - bond - forming (other than the formation of hydrogen bonds, which is a physical - chemical interaction in the context of solution formation, not a chemical reaction in the traditional sense of chemical change with new substances formed).

• Option D: Permanganate

Permanganate ions (\(MnO_4^-\)) in the presence of acetic acid (which can provide \(H^+\) ions to some extent, although acetic acid is a weak acid) can act as oxidizing agents. For example, potassium permanganate (\(KMnO_4\)) in an acidic (acetic acid - containing) medium can oxidize many substances. The permanganate ion in acidic conditions has a strong oxidizing property, and acetic acid can participate in the redox reaction environment (by providing a slightly acidic medium).

Answer:

C. water