In what ways are the roots of a plant like an ion-exchanger used to purify hard water?
A)The roots release ions, which exchange with the mineral ions in the soil.
B)The plant roots purify water.
C)The plant roots trap ions in the water and store them until recharged.
D)all of the above
E)none of the above

Question

Quizplus · Accepted Answer

The roots of a plant absorb ions from the soil, and at the same time, release other ions, creating an ion exchange process. This is similar to how an ion-exchanger purifies hard water by exchanging the mineral ions with other ions present in the ion-exchange resin. Choice B and C are incorrect, as the plant roots are not used to purify water, but rather they play a role in the ion-exchange process in the soil. Choice D is incorrect, as only option A is correct.

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