Fill in the missing data in the given table.

	Name of the salt	Formula	Salt obtained from
			Base	Acid
$\left(\mathrm{i}\right)$	Ammonium chloride	${\mathrm{NH}}_4\mathrm{Cl}$	${\mathrm{NH}}_4\mathrm{OH}$	--
$\left(\mathrm{ii}\right)$	Copper sulphate	--	--	${\mathrm{H}}_2{\mathrm{SO}}_4$
$\left(\mathrm{iii}\right)$	Sodium chloride	$\mathrm{NaCI}$	$\mathrm{NaOH}$	--
$\left(\mathrm{iv}\right)$	Magnesium nitrate	$\mathrm{Mg}{\left({\mathrm{NO}}_3\right)}_2$	--	${\mathrm{HNO}}_3$
$\left(\mathrm{v}\right)$	Potassium sulphate	${\mathrm{K}}_2{\mathrm{SO}}_4$	--	--
$\left(\mathrm{vi}\right)$	Calcium nitrate	$\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2$	$\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$	--

 

What are strong and weak acids? In the following list of acids, separate strong acids from weak acids. Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid.

In the following schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if the following changes are made?

(a) In place of zinc granules, the same amount of zinc dust was taken in the test tube.

(b) Instead of dilute sulphuric acid, dilute hydrochloric acid is taken.

(c) In place of zinc, copper turnings are taken.

(d) Sodium hydroxide is taken in place of dilute sulphuric acid and the tube is heated.

For making cake, baking powder is taken. If at home mother uses baking soda instead of baking powder in cake.

(a) How will it affect the taste of the cake and why? 

(b) How can baking soda be converted into baking powder?

(c) What is the role of tartaric acid added to baking soda?

A metal carbonate $\mathrm{X}$ on reacting with an acid gives a gas which when passed through a solution $\mathrm{Y}$ gives the carbonate back. On the other hand, a gas $\mathrm{G}$ that is obtained at anode during electrolysis of brine is passed on dry $\mathrm{Y}$, it gives a compound $\mathrm{Z}$, used for disinfecting drinking water. Identify $\mathrm{X}, \mathrm{Y}, \mathrm{G},$and $\mathrm{Z}.$

A dry pellet of a common base $\mathrm{B}$, when kept in open absorbs moisture and turns sticky. The compound is also a by-product of chlor-alkali process. Identify $\mathrm{B}$, what type of reaction occurs when $\mathrm{B}$ is treated with an acidic oxide. Write a balanced chemical equation for one such solution.

Identify the compound $\mathrm{X}$ on the basis of the reactions given below. Also, Write the name and chemical formula of $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$.