Question

When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?

• A. Organic matter
• B. Quick lime
• C. Slaked lime
• D. Calamine solution

Answer 1

The correct option is A

Organic matter

Explanation for correct option:

(A) Organic matter

• “Organic matter refers to the large source of carbon-based compounds found within natural/ aquatic environments.”
• When the soil is too basic, plants do not grow well in it. To improve its quality organic matter is added to the soil.
• It covers a wide range of things like lawn clippings/leaves/stems/branches/manure.

Explanation for incorrect options:

(B) Quick lime

• The chemical formula of Quick lime is $\mathrm{CaO}$.
• Quicklime is widely used in the production of iron as well as steel/ paper industry.

(C) Slaked lime

• The chemical formula of slaked lime is $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$.
• It is used in mortars/plasters/cement.

(D) Calamine solution

• The chemical formula of calamine solution is ${\mathrm{Fe}}_2{\mathrm{O}}_4\mathrm{Zn}$.
• Calamine is used to relieve itching/skin irritations.

Hence, the correct option is A i.e. Organic matter.