Question

list some examples and use of alkalis

Answer 1

Sodium hydroxide is used to make paper, detergents and soap.
Potassium hydroxide is used in farming to make acidic soil more alkaline so that plants will grow better in it, and is also used as the electrolyte in alkaline, Ni-Cd, and Ni-MH batteries.
Calcium carbonate is used as a building material.
Magnesium hydroxide is used to help with stomach aches or indigestion. It makes the contents of a stomach less acidic.

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Answer 2

Uses of alkalis:-
(1) Sodium hydroxide is used to make paper,detergents and soap.

(2) Potassium hydroxide is used in farming to make acidic soil more alkaline so that plants will grow better in it, and is also used as the electrolyte in alkaline, Ni-Cd, and Ni-MH batteries.

(3) Calcium carbonate is used as a building material.

(4) Magnesium hydroxide is used to help withstomach aches or indigestion. It makes the contents of a stomach less acidic.