One of the major constituents of baking powder is sodium hydrogen carbonate, the other constituent is:

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Hydrochloric acid

Sulphuric acid

Tartaric acid

Acetic acid

answer is B.

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Detailed Solution

Concept- Baking powder contains a bicarbonate-based base, a dry buffer, and an acid salt. It's a carbonate or bicarbonate dry mixture with a mild acid. A buffer (such as maize starch) is added to prevent the base and acid from reacting.
When baking powder is added to a batter or dough, the acid-base reaction releases carbon dioxide gas, which creates bubbles in the wet mixture and leaves the batter. Baking powder typically contains sodium bicarbonate as the base, a buffering agent, and one additional acid salt.
In the presence of water, sodium carbonate and acid salts react to form carbon dioxide.
Baking powder comprises around 30% sodium bicarbonate, 5-12% monocalcium phosphate (buffering agent), and 21-26 % sodium aluminium sulphate (acid salt).
Instead of sodium aluminium sulphate, a commercial baking powder may contain sodium acid pyrophosphate. A tartaric acid derivative known as cream of tartar is also used.
Hence, option 2 is correct.

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