Uses of Nitric Acid

Q.

Aqua regia is a mixture of _____.

1. 2 parts of HCl and 1 part of HNO₃.

2. 4 parts of HCl and 5 part of HNO₃.

3. 3 parts of HCl and 1 part of HNO₃.

4. 1 parts of HCl and 3 part of HNO₃.

Q.

Aqua regia is a mixture of:

Q.

Which acid is used in the purification of gold?

1. Nitric acid

2. Sulphuric acid

3. Sulphurous acid

4. Ammonia

Q.

Question 15
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him, which he dipped in a particular solution.

The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?

Q.

Aqua regia is prepared by mixing concentrated $\mathrm{HCl}$and concentrated ${\mathrm{HNO}}_3$in the ratio:

1. 1:3

2. 1:4

3. 3:1

4. 3:2

Q.

Why is nitric acid used in rocket fuel?

1. Strong reducing agent

2. Strong oxidizing agent

3. Spontaneously ignited

4. Acts as both oxidizing and reducing agent

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.

iii. Some quantity of nitric acid gets decomposed at a higher temperature.

1. i only

2. ii only

3. i and ii

4. Both of the above reasons are wrong.

Q.

Which property of nitric acid is involved when it is used to etch copper and brassware ?

1. Nitric acid acting as a solvent.

2. Nitric acid acting as an oxidizing agent.

3. Nitric acid acting as a reducing agent.

4. Nitric acid is not used to etch copper or brasswares/

Q.

Nitric acid is used for the preparation of aqua regia.

1. True

2. False

Q.

Which catalyst is used to produce sulphur trioxide from sulphur dioxide in contact process?

1. Vanadium pentaoxide

2. Platinum

3. Vanadium

4. Oleum

Q.

The chemical composition of Laughing gas is

1. Nitric Oxide

2. Nitrous Oxide

3. Nitrogen Dioxide

4. Nitrogen

Q.

Aqua Regia or Royal liquid is a mixture of

1. 1 part of Conc.$HN{O}_3$ and 3 part of Conc. $HCl$

2. 1 part of Dil.$HN{O}_3$ and 3 part of Dil. $HCl$

3. 3 part of Conc.$HN{O}_3$ and 1 part of Conc.$HCl$

4. 3 part of Dil.$HN{O}_3$ and 1 part of Dil. $HCl$

Q.

Which of the following acids is known as aqua fortis?

1. Free state only

2. Combined state only

3. Both in free and combined state

4. None of these

Q. Which of the following is not an application of nitric acid?

1. Production of ammonium nitrate

2. Production of explosives

3. Production of sulphur dioxide

4. Dissolution of metals

Q.

Why should curd and sour substances not be kept in brass and copper vessels?Why should water be never added dropwise to concentrated sulphuric acid? [3 MARKS]

Q.

Please tell me whether this idea will work.

It is about using water as a fuel.

Using electrolysis we can separate hydrogen and oxygen from water.

So can we combine this and used as a fuel.

Or hydrogen on its own is a good fuel.

Where all can this idea be used?

Q.

Gold cannot be extracted from an alloy using nitric acid.

1. True

2. False

Q.

Gold cannot be extracted from an alloy using nitric acid.

1. False

2. True

Q.

Which of the following options are the main applications of the nitric acid?

1. Manufacture of fertilizers

2. For etching alphabets and pictures on metals

3. Preparation of aqua regia used for dissolving noble metals

4. It is used to prepare sulphur dioxide.

Q. How is HCl gas synthesized by Direct Method?

1. Hydrogen gas combines with chlorine gas explosively in the dark.
   
2. Hydrogen gas combines with chlorine gas in diffused sunlight or UV light.
3. Hydrogen gas combines with chlorine gas explosively in direct sunlight.
4. None of the above.

Q.

Which gas is called laughing gas?