Nature of Acids and Bases

A solution of a base with pH $12.1$ is given.

Which of the following can be done to decrease its pH?

P) add distilled water to it.

Q) add a solution of a different base with pH 8.7.

R) add a few drops of an acid with an unknown pH.

What is the meaning of dilution of acids and bases?

${\mathrm{NH}}_3$ gas can be dried by passing it over:

In which of the following oxalic acid is found naturally

The bulb is not glowing in this experimental setup. Because:

Which is a weak acid?

Dilution is the process of 

The aqueous solution of hydrogen chloride contains

Which of the following ionisation equation for acid or base is wrong?

$\mathrm{CaO}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{X}$

${\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}\to \mathrm{Y}$

${\mathrm{SO}}_2+{\mathrm{H}}_2\mathrm{O}\to \mathrm{Z}$

$N_2{O}_3 +H_{2}O\to 2T$

As a result of the interaction of these oxides with water. Compounds X, Y, Z, and T are formed. Which of these compounds is named incorrectly?

Which of the following can act as an antacid?

If a base dissolves in water by what name is it better known?

Which one is the strongest acid amongst these - 

Identify the hydronium ion among the following.

What happens when a base is mixed with water?

_____ act as an antacid to cure acidity.