Which of the following is not a use of Baking Soda?

Soap solution used for cleaning purpose appears cloudy. This is due to the fact that soap micelles can _____.

Match the following :

Match List $\mathrm{I}$ with List $\mathrm{II}$ and select the correct answer using the code given below the Lists:

Which of the following substances cause temporary hardness in water?

$1. Mg{\left(HC{O}_3\right)}_2$

$2. Ca{\left(HC{O}_3\right)}_2$

$3. CaC{l}_2$

$4. MgS{O}_4$

Select the correct answer using the code given below.