Answer the case-based question given below:
A bakery uses compound A to make cakes soft and spongy. Compound B is used to remove permanent hardness of water. Compound C is used to disinfect drinking water. Compound D is used in the manufacture of soap and is produced during the electrolysis of brine.
a. Write the chemical formula of compounds A and B.`12swedc
b. Identify compounds C and D.
c. Explain the role of compound A in baking.
d. State one use each of the two gases produced during electrolysis of brine.