Properties of Acids

Q. For dilution of concentrated acid, we should add:

1. concentrated acid into water.
2. first water into acid and then more acid.
3. first water into acid and then more water.
4. water into concentrated acid.

Q.

Which among the following has a corrosive effect on the skin?

1. Sulphuric acid

2. Salt solution

3. Distilled water

4. Sugar solution

Q.

What is more dangerous acid or base?

Q. When bitten by an ant, the sting causes irritation due to the presence of _________ in the sting.

1. a base in the sting.
2. formic acid in the sting.
3. poisonous chemicals in the sting.
4. Both (a) and (b)

Q.

Hands that have touched phenolphthalein powder will turn pink when dipped in:

1. Water

2. Carbonated water

3. Soap solution

4. Acetic acid solution

Q. pH of soils can be controlled by:

1. Addition of dead organic matter.
2. Addition of calcium oxide or calcium hydroxide.
3. Both a and b
4. Addition of salt.

Q.

Which of the following is not a strong acid?

1. Sulphuric acid

2. Citric acid

3. Tartaric acid

4. Hydrochloric acid

Q.

Complete the following equation:

${\mathrm{NaHCO}}_3+\mathrm{HCl}\stackrel{}{\to }---$

Q.

Which among the given non-metallic oxide reacts with water to form an acid present in batteries?

1. Aluminium oxide

2. Zinc oxide

3. Sodium oxide

4. Sulphur trioxide

Q. During dilution of acids, we must add to .

1. acid
2. water
3. salt
4. indicator

Q.

Identify following substances which are underlined
A gas which does not conduct electricity in the liquid state but conducts electricity when dissolved in water

Q.

Which of the following is not a strong acid?

1. Sulphuric acid

2. Citric acid

3. Tartaric acid

4. Hydrochloric acid

Q.

The strength of an acid depends on its tendency to:

1. Accept protons

2. Donate protons

3. Accept Electrons

4. Donate electrons

Q. Which of the following gas is released when an acid reacts with metal carbonate?

1. Oxygen
2. Hydrogen
3. Nitrogen
4. Carbon dioxide

Q. Fill in the blanks:
A strong acid has a weak _________ and a weak base has a strong ________.