Tests for Hydrochloric Acid

Q. Which of the following statements is true about the reaction of ferric chloride with ammonium hydroxide?

i. A reddish brown precipitate is formed.
ii. A dirty green precipitate is formed.
iii. $Fe{\left(OH\right)}_3$ is formed.
iv. $Fe{\left(OH\right)}_2$ is formed.

[1 mark]

1. (i) and (iv)
2. (ii) and (iv)
3. (i) and (iii)
4. (ii) and (iii)

Q.

When the mixture of manganese dioxide and concentrated hydrochloric acid is subjected to heat

1. hydrogen gas is liberated

2. oxygen gas is liberated

3. no reaction takes place.

4. chlorine gas is liberated.

Q.

What happens when an aqueous solution of sulphur dioxide reacts with oxygen?

1. Hydrochloric acid is formed

2. Sulphuric acid is formed

3. Nitric acid is formed

4. Sulfurous acid is formed

Q.

A greenish yellow gas X is liberated when concentrated hydrochloric acid is heated with manganese dioxide?

1. SO₂

2. H­₂S

3. SO

4. Cl₂

Q. Name the gaseous product released when sodium bicarbonate reacts with sulphuric acid.

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

Q.

Chlorine gas evolves when HCl acid is added to:

1. Calcium carbonate

2. Manganese dioxide

3. Zinc metal

4. Sodium sulphite

Q.

How can you distinguish between $diluteHCl$ and $diluteHN{O}_3$?

1. By adding a few drops of silver nitrate

2. By adding a few drops of sodium hydroxide

3. By adding a few drops of red litmus

4. By adding a few drops of phenolphthalein

Q.

What happens when HCl is treated with an aqueous solution of $AgN{O}_3$?

Q. Which of the following gas is evolved when concentrated hydrochloric acid is made to react with manganese dioxide?

1. $O_3$
2. $O_2$
3. $H_2$
4. ${Cl}_2$

Q. Give reason why thick white fumes are formed when a glass rod dipped in NH${}_4$OH is brought near the mouth of the bottle full of HCl. [1 mark]​

Q. Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?

Q. In the reaction $2Ag+2H_{2}S{O}_4\to A{g}_{2}S{O}_4+2H_{2}O+S{O}_2$, sulphuric acid acts as :

1. an oxidizing agent
2. a reducing agent
3. an acid as well as an oxidant
4. a catalyst

Q. Which of the following statements is true about the reaction of ferric chloride with ammonium hydroxide?

i. A reddish brown precipitate is formed.
ii. A dirty green precipitate is formed.
iii. $Fe{\left(OH\right)}_3$ is formed.
iv. $Fe{\left(OH\right)}_2$ is formed.

[1 mark]

1. (i) and (iv)
2. (ii) and (iv)
3. (i) and (iii)
4. (ii) and (iii)

Q. which acid is used to produce brisk effervescence of CO₂ when reacted with CaCO₃

Q.

How can you distinguish between $diluteHCl$ and $diluteHN{O}_3$?

1. By adding a few drops of silver nitrate

2. By adding a few drops of sodium hydroxide

3. By adding a few drops of red litmus

4. By adding a few drops of phenolphthalein

Q.

Which gas is released when ethyl alcohol reacts with sodium?

1. Hydrogen

2. Nitrogen

3. Oxygen

4. Carbon dioxide

Q. Number of gaseous products that manganese dioxide forms on reaction with $HCl$ is:

1. $0$
2. $1$
3. $2$
4. $3$

Q.

When the mixture of manganese dioxide and concentrated hydrochloric acid is subjected to heat

1. hydrogen gas is liberated

2. oxygen gas is liberated

3. no reaction takes place.

4. chlorine gas is liberated.

Q. Vegetable colouring matter in presence of moisture is bleached by $S{O}_2$ due to.

1. Oxidation
2. Reduction
3. Sulphonation
4. Unsaturation

Q.

Aqua regia releases nascent:

1. Chlorine

2. Nitrogen

3. hytrogen

4. Oxygen