Question

17. A substance `X` used in the kitchen for making tasty crispy pakoras and is also an ingredient of antacid. Name the substance `X`. (i) How does `X` help to make cakes and bread soft and spongy. (ii) Is the pH value of solution of `X` is lesser than or greater than 7.0?

Answer 1

X is baking soda
i) by releasing carbon dioxide baking soda makes the cake soft and spongy
ii) it's pH scale is greater than 7.0
Hope it helps you...

Answer 2

The substance must be Sodium bicarbonate which is used in kitchen for preparing tasty and crispy pakoras as it is also an ingredient of antacid.  

Explanation:

The chemical formula is $NaHCO_3$ (sodium bicarbonate).

It is also used in bakery to make fluffy cakes as when it is heated it releases the carbon dioxide gas and that gas makes the cake fluffy. It is a basic salt as it is composed of NaOH and $H_2CO_3$ and here NaOH is a base of strong type.