Which of the following will produce a precipitate? a) rh3+(aq) + k3po4(aq) b) nb3+(aq) + li2co3 (aq) c) co2+(aq) + zn(no3)2 (aq) d) k1+(aq) + na2s (aq)

The correct answer is Option d.

Explanation:

Precipitation reaction is defined as the reaction in which an insoluble salt is formed when two solutions are mixed containing soluble substances. The insoluble salt settles down at the bottom of the reaction mixture.

For the given options:

The chemical equation follows:

As, no solid product is getting formed, it will not form any precipitate.

The chemical equation follows:

As, no solid product is getting formed, it will not form any precipitate.

The chemical equation follows:

As, no solid product is getting formed, it will not form any precipitate.

The chemical equation follows:

As, potassium sulfide is getting formed as a solid. It is considered as a precipitate.

Hence, the correct answer is Option d.

b i think it’s a water wheel turning in a stream