A sample of soil is collected from a garden. When this sample is mixed with the extract of red cabbage, the color of the extract changed to light pink. Which of the following(s) should be added to make the soil suitable for plants?

Quicklime

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Lemon extract

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Vinegar

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Slaked lime

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Solution

The correct options are
A
Quicklime

D
Slaked lime

We know that a neutral soil is suitable for the growth of plants. As the soil sample turned the color of the extract of red cabbage light pink, it means that the soil is acidic in nature. Hence to make it neutral we should add a base to the soil. Therefore, caustic soda $(NaOH)$ or slaked lime $({Ca(OH)}_{2})$ should be used.

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