Which of the following vitamins can be synthesized by our body?

Match the following :

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.

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

Which of the following is baking soda?

(A) $N{a}_{2}C{O}_3.10H_{2}0$

(B) $NaHC{O}_3$

(C) $N{a}_{2}C{O}_3.H_{2}O$

(D) $N{H}_{4}Cl$