Given below are a few solutions and pH values. Match the solutions to the correct pH values.

Why baking soda is used in baking cake. Explain with the help of a balanced chemical equation. List down any other two use of baking soda.

a) Milk of magnesia: 10
b) Gastric juices: 1
c) Brine: 7
d) Aqueous Sodium hydroxide: 13

During the thermal decomposition of baking soda $\left(NaHC{O}_3\right)\to N{a}_{2}C{O}_3,C{O}_2$and $H_{2}O$ is produced. The production $C{O}_2$ gives the cake its fluffy and soft texture.
The balanced reaction is as follows:

$NaHC{O}_3\to N{a}_{2}C{O}_3+C{O}_2+H_{2}O$

Uses of baking soda are as follows:

1. It is used in fire extinguishers. 
2. To neutralize the excess acid in the stomach, it acts as an antacid. 
3. To neutralize the acidic effect of an insect sting.