Preparation of Nitric Acid

Q.

When a glass rod dipped in ammonia solution is brought near vapours of hydrochloric acid we see the formation of a dense white fume. What is this dense white fume?

1. Water vapour

2. Ammonium Nitrate

3. Ammonium Chloride

4. Nitrosyl Chloride

Q.

Which one acts as both oxidizing as well as reducing agent?

1. ${\mathrm{CH}}_2{\mathrm{O}}_2$

2. ${\mathrm{HNO}}_2$

3. ${\mathrm{KNO}}_3$

4. ${\mathrm{O}}_2$

Q.

What important industrial process starts with reaction for the catalytic oxidation of ammonia? Name the catalyst used.

Q.

Why is conc. $HCl$ not used in place of conc. $H_{2}S{O}_4$ in the laboratory preparation of nitric acid?

1. HCl is an acid

2. HCl is a strong base

3. HCl is volatile

4. Conc. HCl slows down the reaction

Q.

What is the role of concentrated $H_{2}S{O}_4$ in the laboratory preparation of nitric acid?

1. More volatile acid

2. More volatile base

3. Less volatile base

4. Less volatile acid

Q.

Select the correct option/s for Ostwald process.

1. Oxidation of ammonia $N{H}_3$ in catalytic chamber gives nitric oxide.

2. Oxidation of ammonia $N{H}_3$ in catalytic chamber gives nitric oxide.

3. Absorption of nitric oxide $NO$ in oxidation chamber gives nitric acid $HN{O}_3$.

4. Absorption of nitrogen dioxide in water gives nitric acid $HN{O}_3$.

Q.

Products obtained during catalytic oxidation of ammonia are?

1. $N{O}_2$, $H_{2}O$ and $O_2$
2. $NO$ and $H_{2}O$
3. $NO$, $H_{2}O$ and $O_2$
4. $NO$, $H_2$ and $O_2$

Q.

Which of the following compounds are required for the laboratory preparation of nitric acid?

1. Sodium nitrate or potassium nitrate and concentrated sulphuric acid

2. Sodium nitrite or potassium nitrite and dilute sulphuric acid

3. Sodium nitrite or potassium nitrite and concentrated sulphuric acid

4. Sodium nitrate or potassium nitrate and dilute sulphuric acid

Q.

In laboratory method of preparation, temperature is maintained ${200}^{0}C$ because,

1. To avoid nitric acid from decomposing at greater temperature

2. Since Conc.$H_{2}S{O}_4$ is volatile , it may explode.

3. To avoid glass apparatus from breaking at high temperature

4. To avoid sodium or potassium sulphate sticking to walls of apparatus at higher temperature.

Q. There is very little difference in acid strength in the series $H_{3}P{O}_4,H_{3}P{O}_3$ and $H_{3}P{O}_2$, because :

1. phosphorus in these acids exists in different oxidation states.
2. the hydrogens in these acids are not all bound to the phosphorus
3. phosphorus is highly electro negative element
4. phosphorus oxides are less basic

Q.

Name the catalyst which is used in the oxidation of ammonia to prepare nitric oxide. Name the other product of the oxidation reaction.

Q.

Consider the statements for preparation of nitric acid.

i)Conc.$H_{2}S{O}_4$ is non-volatile.

ii)Produce volatile nitric acid.

1. Only i) is correct

2. Only ii) is correct

3. Both i) and ii) are correct and are not related

4. Both i) and ii) are correct and are related.

Q. Which salt is used along with concentrated sulphuric acid for the laboratory preparation of nitric acid?

1. Sodium nitrite or potassium nitrite
2. Sodium nitrate or potassium nitrite
3. Sodium nitrate or potassium nitrite
4. Sodium nitrate or potassium nitrate

Q.

Choose from the brackets and fill in the blanks with appropriate words.

Conc. sulphuric acid is a _____ acid. (volatile/ not volatile)

Q.

Which method is used to produce the acid used for etching alphabets on metals industrially?

1. Ostwald process

2. Haber process

3. Bosch process

4. Contact process

Q.

In the laboratory preparation of nitric acid, it can be obtained below ${200}^{\circ }$C or above ${200}^{\circ }$C, but the lower temperature is preferred. Which of the following reason(s) is /are correct?

i. The glass apparatus may break at a higher temperature.

ii. At lower temperature, potassium or sodium sulphate is formed, which cannot be easily removed from the apparatus.

1. Both of the above reasons are wrong.

2. i only

3. ii only

4. i and ii

Q.

Select the correct option(s) for the Ostwald process.

1. Oxidation of ammonia $N{H}_3$ in catalytic chamber gives nitrogen dioxide.

2. Oxidation of ammonia $N{H}_3$ in catalytic chamber gives nitric oxide.

3. Absorption of nitric oxide $NO$ in oxidation chamber gives nitric acid $HN{O}_3$.

4. Absorption of nitrogen dioxide in water gives nitric acid $HN{O}_3$.

Q.

Aqua Regia is a mixture of-

1. (a) Dilute Hydrochloric acid and concentrated Nitric acid.

2. (b) Concentrated Hydrochloric acid and dilute Nitric acid.

3. (c) Concentrated Hydrochloric acid $[1part]$ and concentrated Nitric acid $[3parts]$.

4. (d) Concentrated Hydrochloric acid $[3parts]$ and concentrated Nitric acid$[1part]$.

Q.

What is the product when phosphorus pentaoxide is reacted with oxygen ?