Chemical name of washing soda is ________.

Read the following statements.

Statement - I: Plaster of Paris is stored in moisture proof containers.

Statement - II: Plaster of Paris on reaction with water changes into a hard solid gypsum. 

Select the correct answer from the options given below:

In the following reactions, products $\left(\mathrm{A}\right)$ and $\left(\mathrm{B}\right)$ , respectively, are:
$\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}+\mathrm{C}{\mathrm{l}}_2\to \left(\mathrm{A}\right)+\mathrm{s}\mathrm{i}\mathrm{d}\mathrm{e} \mathrm{p}\mathrm{r}\mathrm{o}\mathrm{d}\mathrm{u}\mathrm{c}\mathrm{t}\mathrm{s}$
$\left(\mathrm{h}\mathrm{o}\mathrm{t} \mathrm{a}\mathrm{n}\mathrm{d} \mathrm{c}\mathrm{o}\mathrm{n}\mathrm{c}.\right)$

$\mathrm{C}\mathrm{a}{\left(\mathrm{O}\mathrm{H}\right)}_2+\mathrm{C}{\mathrm{l}}_2\to \left(\mathrm{B}\right)+\mathrm{s}\mathrm{i}\mathrm{d}\mathrm{e} \mathrm{p}\mathrm{r}\mathrm{o}\mathrm{d}\mathrm{u}\mathrm{c}\mathrm{t}\mathrm{s}$
$\left(\mathrm{d}\mathrm{r}\mathrm{y}\right)$

Baking powder is a mixture of baking soda and