Question

(a) Farmers add slaked lime to acidic soils.
(b) Soap solution or baking soda paste is applied on the part of body stung by
a bee.
(c)Factory wastes and city sewerage is neutralised before discharging in
rivers.
(d)Antacids are used for relieving stomach activity.​

Answer 1

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(A) Farmers add slaked lime to acidic soils.

$\longmapsto$ If the soil is too acidic, it is treated with bases like quicklime (calcium oxide) or slaked lime (calcium hydroxide). These bases neutralize the acidic soil and thus makes the soil neutral.

(B) Soap solution or baking soda paste is applied on the part of body stung by a bee.

$\longmapsto$ The effect of an ant or bee sting can be neutralized by rubbing a base like baking soda or soap solution on the affected area of the skin. These bases neutralizes the effect of an acid.

(C) Factory wastes and city sewerage is neutralised before discharging in rivers.

$\longmapsto$ Slaked lime are added to factory wastes and city sewerage to neutralize the acid present in them before they are discharged into the water bodies.

(D) Antacids are used for relieving stomach activity.

$\longmapsto$ Doctors give antacid like milk of magnesia to cure indigestion, as because a base neutralizes the effect of an acid. Hence, antacids are used for relieving stomach activity.