317019
Which of the following salt would give \(\mathrm{SO}_{2}\) with hot and dil. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}\) reacts with hot and diluted \(\mathrm{H}_{2} \mathrm{SO}_{4}\) to give \(\mathrm{SO}_{2}\) gas which decolourises bromine water. \(\begin{aligned}\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow & \mathrm{Na}_{2} \mathrm{SO}_{4} \\& +\mathrm{SO}_{2}+\mathrm{H}_{2} \mathrm{O} \\\mathrm{Br}_{2}+\mathrm{H}_{2} \mathrm{O} \longrightarrow & 2 \mathrm{HBr}+[\mathrm{O}]\end{aligned}\) Decolourisation of bromine water. \(\mathrm{SO}_{2}+[\mathrm{O}] \longrightarrow \mathrm{SO}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS
317020
In which of the following reactions, \(\mathrm{H}_{2} \mathrm{SO}_{4}\) behaves as an oxidizing agent?
317021
In the preparation of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) by Contact Process, why is \(\mathrm{SO}_{3}\) not absorbed directly in water to form \(\mathrm{H}_{2} \mathrm{SO}_{4}\) ?
1 Acid fog is formed, which is difficult to condense.
2 It does not dissolve in water
3 It is explosive
4 Gets reduced
Explanation:
Acid fog is formed, which is difficult to condense.
CHXI11:THE P-BLOCK ELEMENTS
317022
Conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) displaces hydrogen chloride from chlorides because:
1 Chorides are the salts of hydrochloric acid which is more volatile than \(\mathrm{H}_{2} \mathrm{SO}_{4}\).
2 Sulphates are more soluble than chlorides.
3 \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is stronger acid than \(\mathrm{HCl}\).
4 Sulphates are less soluble than chlorides.
Explanation:
A given acid decomposes the salt of that acid which is more volatile than that.
317019
Which of the following salt would give \(\mathrm{SO}_{2}\) with hot and dil. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}\) reacts with hot and diluted \(\mathrm{H}_{2} \mathrm{SO}_{4}\) to give \(\mathrm{SO}_{2}\) gas which decolourises bromine water. \(\begin{aligned}\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow & \mathrm{Na}_{2} \mathrm{SO}_{4} \\& +\mathrm{SO}_{2}+\mathrm{H}_{2} \mathrm{O} \\\mathrm{Br}_{2}+\mathrm{H}_{2} \mathrm{O} \longrightarrow & 2 \mathrm{HBr}+[\mathrm{O}]\end{aligned}\) Decolourisation of bromine water. \(\mathrm{SO}_{2}+[\mathrm{O}] \longrightarrow \mathrm{SO}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS
317020
In which of the following reactions, \(\mathrm{H}_{2} \mathrm{SO}_{4}\) behaves as an oxidizing agent?
317021
In the preparation of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) by Contact Process, why is \(\mathrm{SO}_{3}\) not absorbed directly in water to form \(\mathrm{H}_{2} \mathrm{SO}_{4}\) ?
1 Acid fog is formed, which is difficult to condense.
2 It does not dissolve in water
3 It is explosive
4 Gets reduced
Explanation:
Acid fog is formed, which is difficult to condense.
CHXI11:THE P-BLOCK ELEMENTS
317022
Conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) displaces hydrogen chloride from chlorides because:
1 Chorides are the salts of hydrochloric acid which is more volatile than \(\mathrm{H}_{2} \mathrm{SO}_{4}\).
2 Sulphates are more soluble than chlorides.
3 \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is stronger acid than \(\mathrm{HCl}\).
4 Sulphates are less soluble than chlorides.
Explanation:
A given acid decomposes the salt of that acid which is more volatile than that.
317019
Which of the following salt would give \(\mathrm{SO}_{2}\) with hot and dil. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}\) reacts with hot and diluted \(\mathrm{H}_{2} \mathrm{SO}_{4}\) to give \(\mathrm{SO}_{2}\) gas which decolourises bromine water. \(\begin{aligned}\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow & \mathrm{Na}_{2} \mathrm{SO}_{4} \\& +\mathrm{SO}_{2}+\mathrm{H}_{2} \mathrm{O} \\\mathrm{Br}_{2}+\mathrm{H}_{2} \mathrm{O} \longrightarrow & 2 \mathrm{HBr}+[\mathrm{O}]\end{aligned}\) Decolourisation of bromine water. \(\mathrm{SO}_{2}+[\mathrm{O}] \longrightarrow \mathrm{SO}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS
317020
In which of the following reactions, \(\mathrm{H}_{2} \mathrm{SO}_{4}\) behaves as an oxidizing agent?
317021
In the preparation of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) by Contact Process, why is \(\mathrm{SO}_{3}\) not absorbed directly in water to form \(\mathrm{H}_{2} \mathrm{SO}_{4}\) ?
1 Acid fog is formed, which is difficult to condense.
2 It does not dissolve in water
3 It is explosive
4 Gets reduced
Explanation:
Acid fog is formed, which is difficult to condense.
CHXI11:THE P-BLOCK ELEMENTS
317022
Conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) displaces hydrogen chloride from chlorides because:
1 Chorides are the salts of hydrochloric acid which is more volatile than \(\mathrm{H}_{2} \mathrm{SO}_{4}\).
2 Sulphates are more soluble than chlorides.
3 \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is stronger acid than \(\mathrm{HCl}\).
4 Sulphates are less soluble than chlorides.
Explanation:
A given acid decomposes the salt of that acid which is more volatile than that.
317019
Which of the following salt would give \(\mathrm{SO}_{2}\) with hot and dil. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and also decolourises \(\mathrm{Br}_{2}\) water?
1 \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)
2 \(\mathrm{NaHSO}_{4}\)
3 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
4 \(\mathrm{Na}_{2} \mathrm{~S}\)
Explanation:
\(\mathrm{Na}_{2} \mathrm{SO}_{3}\) reacts with hot and diluted \(\mathrm{H}_{2} \mathrm{SO}_{4}\) to give \(\mathrm{SO}_{2}\) gas which decolourises bromine water. \(\begin{aligned}\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow & \mathrm{Na}_{2} \mathrm{SO}_{4} \\& +\mathrm{SO}_{2}+\mathrm{H}_{2} \mathrm{O} \\\mathrm{Br}_{2}+\mathrm{H}_{2} \mathrm{O} \longrightarrow & 2 \mathrm{HBr}+[\mathrm{O}]\end{aligned}\) Decolourisation of bromine water. \(\mathrm{SO}_{2}+[\mathrm{O}] \longrightarrow \mathrm{SO}_{3}\)
CHXI11:THE P-BLOCK ELEMENTS
317020
In which of the following reactions, \(\mathrm{H}_{2} \mathrm{SO}_{4}\) behaves as an oxidizing agent?
317021
In the preparation of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) by Contact Process, why is \(\mathrm{SO}_{3}\) not absorbed directly in water to form \(\mathrm{H}_{2} \mathrm{SO}_{4}\) ?
1 Acid fog is formed, which is difficult to condense.
2 It does not dissolve in water
3 It is explosive
4 Gets reduced
Explanation:
Acid fog is formed, which is difficult to condense.
CHXI11:THE P-BLOCK ELEMENTS
317022
Conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) displaces hydrogen chloride from chlorides because:
1 Chorides are the salts of hydrochloric acid which is more volatile than \(\mathrm{H}_{2} \mathrm{SO}_{4}\).
2 Sulphates are more soluble than chlorides.
3 \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is stronger acid than \(\mathrm{HCl}\).
4 Sulphates are less soluble than chlorides.
Explanation:
A given acid decomposes the salt of that acid which is more volatile than that.
