Physical Properties of Nitric Acid

Q.

It is advised to cool the nitric acid vapours with cold water after preparation, as it is

1. volatile in nature

2. heavier than air

3. colourless in appearance

4. non- volatile in nature

Q.

Which of the following gas is formed when very dilute nitric acid reacts with magnesium at room temperature?

1. N₂O

2. H₂

3. NO₂

4. NO

Q.

What is the colour of pure nitric acid?

1. Colourless
2. Yellow
3. Red
4. Brown

Q.

Boiling cannot be used to concentrate Nitric Acid beyond a certain concentration.

1. True

2. False

Q. Nitric acid is generally colourless. What gives it a yellowish shade?

1. Solubility in water
2. Decomposition in the presence of light
3. Strong acidic nature
4. Formation of azeotropic mixture

Q.

Explain nitric acid stains the skin yellow.

Q.

Pure nitric acid is colourless but the acid obtained in the laboratory is slightly yellow. The yellow colour is due to_____________.

1. The dissolution of $N{O}_2$ in the acid.
2. The dissolution of $N_2{O}_5$ in the acid.
3. The dissolution of NO in the acid.
4. The dissolution of $N_{2}O$ in the acid.

Q. $P_4{O}_{10}$ on reacting with water does not form :

1. Tetra metaphosphoric acid.
2. Phosphorous acid.
3. Orthophosphoric acid.
4. Pyrophsophoric acid.

Q. Identify the correct statements:

1. $P_4{O}_{10}$ is used as a drying agent.
2. $P_4{O}_{10}$ contains $p\pi -d\pi$ back bonding.
3. $P_4{O}_{10}$ hydrolsyse in water forming phosphorus acid.
4. In $P_4{O}_{10}$ each P atom is bonded to three oxygen atoms.

Q.

Nitric acid cannot be concentrated beyond ___ % by the distillation of a dilute solution of $HN{O}_3$.

Q.

What is the colour of pure nitric acid?

1. Colourless

2. Brown

3. Yellow

4. None of the above

Q. Nitric acid is generally colourless. What gives it a yellowish shade?

1. Solubility in water
2. Decomposition in the presence of light
3. Strong acidic nature
4. Formation of azeotropic mixture

Q.

What is the colour of Nitric Acid?

1. colourless

2. Yellowish Brown

3. None of the above

4. Pure Nitric Acid (conc) is colourless and commercial Nitric Acid is yellowish brown.

Q. What is the boiling point of Nitric Acid ?

1. 70 degree celsius
2. 90 degree celsius
3. 88 degree celsius
4. 86 degree celsius