Uses of Nitric Acid

Q.

In contact process why SO3 is not directly converted to H2SO4 instead there are two more steps to convert it

Q.

Aqua fortis can be used in the purification of silver, gold, platinium etc.

1. True

2. False

Q. Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.

Q.

NItric acid is used in the preparation of TNT.

1. True

2. False

Q.

Describe the theory of manufacture of sulphuric acid by contact process, with all the necessary condition (No technical details are required but equations should be given for each stage of process).

Q. (a) What is aqua regia?
(b) State the uses of aqua-regia.
(c) What is the function of HCI in the preparation of aqua-regia? [5 MARKS]

Q.

Which of the followings are properties of sulphuric acid

1. Corrosive nature

2. Hygroscopic nature

3. Oxidising nature

4. Dehydrating agent

Q.

Explain the following

(ⅰ ) Dilute Nitric acid is generally considered a typical acid but not so in its reaction with metals.

(ⅱ) Concentrated Nitric acid appears yellow when it is left standing in a glass bottle.

(ⅱⅰ) All glass apparatus is used in the laboratory preparation of Nitric acid.

Q.

Mention three important uses of nitric acid. Give the property of nitric acid involved in the use.

Q. Aqua regia is a mixture of $conc.HN{O}_3$ and $conc.HCl$ in the ratio of .

(A) 1:3
(B) 2:3
(C) 3:1
(D) 3:2 [1 mark]

Q. Which of the following will you use to remove rust stains on cloth?

1. Alcohol
2. Oxalic acid solution
3. Kerosene oil
4. Lime

Q. Aqua regia is a mixture of $conc.HN{O}_3$ and $conc.HCl$ in the ratio .

1. 1:3
2. 3:1
3. 2:3

Q. What is oxo acid

Q. Aqua regia is a mixture of $conc.HN{O}_3$ and $conc.HCl$ in the ratio .

1. 1:3
2. 3:1
3. 2:3

Q. Question 47
A metal that exists as a liquid at room temperature is obtained by heating its sulphide in the presence of air. Identify the metal and its ore and give the reaction involved.

Q.

Aqua Regia or Royal liquid is a mixture of

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

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

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

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

Q.

Give reasons:

1. In the laboratory preparation of HCl acid from NaCl and conc. H₂SO₄, the residual salt formed at temperatures above 200^oc itforms a hard crust and sticks to the glass( I know it does but I dont know why?)

2. In the fountain expt. to demonstrate the high solubility of HCl gas in water , dry HCl gas is filled in the round bottom flask.

3. Iron sheets are cleaned with HCl acid befor dipping into molten zinc for galvanizing.

Q.

Gold cannot be extracted from an alloy using nitric acid.

1. True

2. False

Q. Match the gases in column- I with their reagent in which these gases are absorbed given in column- II. Matching can be one or more than one.

Q.

State the composition of aqua regia. State which component is the oxidising agent in aqua regia.

Q. Which is a better oxidising agent :
(i) dil. HNO₃
(ii) conc. HNO₃
and Why?

Q. Identify the uses of nitric acid.

1. Fertiliser
2. TNT
3. Dye
4. Aqua regia
5. Oxidising metals
6. Car battery
7. Inhalers
8. Preparing $H_2$