Which of the following compounds are used by farmers to neutralise acidic soil character?

CaO

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MgOH₂

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Na₂CO₃

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None of the choice

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Solution

The correct option is
A

CaO

Calcium oxide is an acidic oxide. When soil pH becomes acidic, it affects the growth of plants. To neutralize the pH of soil, a mild base should be added.
While magnesium hydroxide and sodium carbonate are strong bases that will be harmful for the soil.

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