Question

(i) To grow a specific variety of crop the optimum pH range of the soil should be 5.5 to 7.0.

A farmer decides to add lime to soil. Why does he take such a step?

(ii) What is the chemical name of washing soda? Name the three main raw materials

required for making it? Write the reaction involved in the preparation of washing soda


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Answer 1

Answer:

i) Lime is basic in nature, so it can regulate the ph of the soil.

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ii) Na2CO3 (Sodium Carbonate). For its production, we need Ammonia, Common salt, Water, and Carbon dioxide.

NH3 + H20 + CO2 + NaCl ----->    NaHCO3 + NH4Cl

2NaHCO3 --------->(heated)      Na2CO3 + H20 + CO2

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Answer 2

Answer:

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