QBManager

CHXI11:THE P-BLOCK ELEMENTS

317023 Low volatile-nature of $H_{2} {SO}_{4}$ is due to

1 Hydrogen bonding

2 Van der Waals' forces

3 Strong bonds

4 None of these

CHXI11:THE P-BLOCK ELEMENTS

317024 Assertion :
Sulphuric acid is more viscous than water.
Reason :
Concentrated sulphuric acid has a great affinity for water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Sulphuric acid molecules exhibit a strong tendency to associate with each other, primarily driven by a substantial number of intermolecular hydrogen bonds. $H_{2} {SO}_{4}$ has great affinity for water and functions like a dehydrating agent. So option (2) is correct.

CHXI11:THE P-BLOCK ELEMENTS

317025 The catalyst used in the manufacture of $H_{2} {SO}_{4}$ by contact process is

1

{MnO}_{2}

2

{Cr}_{2} O_{3}

3

{Al}_{2} O_{3}

4

V_{2} O_{5}

Explanation:

$V_{2} O_{5}$ catalyst is used for the manufacture of $H_{2} {SO}_{4}$ by contact process.

NCERT Exemplar

CHXI11:THE P-BLOCK ELEMENTS

317026 Statement A :
In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ .
Statement B :
Acid fog is formed, which is difficult to condense.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

Explanation:

In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ because acid fog is formed, which is difficult to condense.

CHXI11:THE P-BLOCK ELEMENTS

317046 On adding ${Na}_{2} S$ to sodium nitroprusside solution

1

{Na}_{4} [Fe (CN)_{5} NOS]

complex is formed

2

{[Fe (CN)_{5} NOS]}^{4 -}

complex ion is formed

3 A violet colour is formed

4 All of these

Explanation:

On adding ${Na}_{2} S$ to sodium nitroprusside solution, following reaction occurs:
$N a_{2} [F e (C N)_{5} N O] + N a_{2} S \to N a_{4} [\underset{v i o l e t c o m p l e x}{F e (C N)_{5} N O S}]$

CHXI11:THE P-BLOCK ELEMENTS

317023 Low volatile-nature of $H_{2} {SO}_{4}$ is due to

1 Hydrogen bonding

2 Van der Waals' forces

3 Strong bonds

4 None of these

CHXI11:THE P-BLOCK ELEMENTS

317024 Assertion :
Sulphuric acid is more viscous than water.
Reason :
Concentrated sulphuric acid has a great affinity for water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Sulphuric acid molecules exhibit a strong tendency to associate with each other, primarily driven by a substantial number of intermolecular hydrogen bonds. $H_{2} {SO}_{4}$ has great affinity for water and functions like a dehydrating agent. So option (2) is correct.

CHXI11:THE P-BLOCK ELEMENTS

317025 The catalyst used in the manufacture of $H_{2} {SO}_{4}$ by contact process is

1

{MnO}_{2}

2

{Cr}_{2} O_{3}

3

{Al}_{2} O_{3}

4

V_{2} O_{5}

Explanation:

$V_{2} O_{5}$ catalyst is used for the manufacture of $H_{2} {SO}_{4}$ by contact process.

NCERT Exemplar

CHXI11:THE P-BLOCK ELEMENTS

317026 Statement A :
In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ .
Statement B :
Acid fog is formed, which is difficult to condense.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

Explanation:

In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ because acid fog is formed, which is difficult to condense.

CHXI11:THE P-BLOCK ELEMENTS

317046 On adding ${Na}_{2} S$ to sodium nitroprusside solution

1

{Na}_{4} [Fe (CN)_{5} NOS]

complex is formed

2

{[Fe (CN)_{5} NOS]}^{4 -}

complex ion is formed

3 A violet colour is formed

4 All of these

Explanation:

On adding ${Na}_{2} S$ to sodium nitroprusside solution, following reaction occurs:
$N a_{2} [F e (C N)_{5} N O] + N a_{2} S \to N a_{4} [\underset{v i o l e t c o m p l e x}{F e (C N)_{5} N O S}]$

CHXI11:THE P-BLOCK ELEMENTS

317023 Low volatile-nature of $H_{2} {SO}_{4}$ is due to

1 Hydrogen bonding

2 Van der Waals' forces

3 Strong bonds

4 None of these

CHXI11:THE P-BLOCK ELEMENTS

317024 Assertion :
Sulphuric acid is more viscous than water.
Reason :
Concentrated sulphuric acid has a great affinity for water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Sulphuric acid molecules exhibit a strong tendency to associate with each other, primarily driven by a substantial number of intermolecular hydrogen bonds. $H_{2} {SO}_{4}$ has great affinity for water and functions like a dehydrating agent. So option (2) is correct.

CHXI11:THE P-BLOCK ELEMENTS

317025 The catalyst used in the manufacture of $H_{2} {SO}_{4}$ by contact process is

1

{MnO}_{2}

2

{Cr}_{2} O_{3}

3

{Al}_{2} O_{3}

4

V_{2} O_{5}

Explanation:

$V_{2} O_{5}$ catalyst is used for the manufacture of $H_{2} {SO}_{4}$ by contact process.

NCERT Exemplar

CHXI11:THE P-BLOCK ELEMENTS

317026 Statement A :
In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ .
Statement B :
Acid fog is formed, which is difficult to condense.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

Explanation:

In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ because acid fog is formed, which is difficult to condense.

CHXI11:THE P-BLOCK ELEMENTS

317046 On adding ${Na}_{2} S$ to sodium nitroprusside solution

1

{Na}_{4} [Fe (CN)_{5} NOS]

complex is formed

2

{[Fe (CN)_{5} NOS]}^{4 -}

complex ion is formed

3 A violet colour is formed

4 All of these

Explanation:

On adding ${Na}_{2} S$ to sodium nitroprusside solution, following reaction occurs:
$N a_{2} [F e (C N)_{5} N O] + N a_{2} S \to N a_{4} [\underset{v i o l e t c o m p l e x}{F e (C N)_{5} N O S}]$

CHXI11:THE P-BLOCK ELEMENTS

317023 Low volatile-nature of $H_{2} {SO}_{4}$ is due to

1 Hydrogen bonding

2 Van der Waals' forces

3 Strong bonds

4 None of these

CHXI11:THE P-BLOCK ELEMENTS

317024 Assertion :
Sulphuric acid is more viscous than water.
Reason :
Concentrated sulphuric acid has a great affinity for water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Sulphuric acid molecules exhibit a strong tendency to associate with each other, primarily driven by a substantial number of intermolecular hydrogen bonds. $H_{2} {SO}_{4}$ has great affinity for water and functions like a dehydrating agent. So option (2) is correct.

CHXI11:THE P-BLOCK ELEMENTS

317025 The catalyst used in the manufacture of $H_{2} {SO}_{4}$ by contact process is

1

{MnO}_{2}

2

{Cr}_{2} O_{3}

3

{Al}_{2} O_{3}

4

V_{2} O_{5}

Explanation:

$V_{2} O_{5}$ catalyst is used for the manufacture of $H_{2} {SO}_{4}$ by contact process.

NCERT Exemplar

CHXI11:THE P-BLOCK ELEMENTS

317026 Statement A :
In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ .
Statement B :
Acid fog is formed, which is difficult to condense.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

Explanation:

In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ because acid fog is formed, which is difficult to condense.

CHXI11:THE P-BLOCK ELEMENTS

317046 On adding ${Na}_{2} S$ to sodium nitroprusside solution

1

{Na}_{4} [Fe (CN)_{5} NOS]

complex is formed

2

{[Fe (CN)_{5} NOS]}^{4 -}

complex ion is formed

3 A violet colour is formed

4 All of these

Explanation:

On adding ${Na}_{2} S$ to sodium nitroprusside solution, following reaction occurs:
$N a_{2} [F e (C N)_{5} N O] + N a_{2} S \to N a_{4} [\underset{v i o l e t c o m p l e x}{F e (C N)_{5} N O S}]$

CHXI11:THE P-BLOCK ELEMENTS

317023 Low volatile-nature of $H_{2} {SO}_{4}$ is due to

1 Hydrogen bonding

2 Van der Waals' forces

3 Strong bonds

4 None of these

CHXI11:THE P-BLOCK ELEMENTS

317024 Assertion :
Sulphuric acid is more viscous than water.
Reason :
Concentrated sulphuric acid has a great affinity for water.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

Sulphuric acid molecules exhibit a strong tendency to associate with each other, primarily driven by a substantial number of intermolecular hydrogen bonds. $H_{2} {SO}_{4}$ has great affinity for water and functions like a dehydrating agent. So option (2) is correct.

CHXI11:THE P-BLOCK ELEMENTS

317025 The catalyst used in the manufacture of $H_{2} {SO}_{4}$ by contact process is

1

{MnO}_{2}

2

{Cr}_{2} O_{3}

3

{Al}_{2} O_{3}

4

V_{2} O_{5}

Explanation:

$V_{2} O_{5}$ catalyst is used for the manufacture of $H_{2} {SO}_{4}$ by contact process.

NCERT Exemplar

CHXI11:THE P-BLOCK ELEMENTS

317026 Statement A :
In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ .
Statement B :
Acid fog is formed, which is difficult to condense.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both Statements are incorrect.

Explanation:

In the preparation of $H_{2} {SO}_{4}$ by contact process, ${SO}_{3}$ is not absorbed directly in water to form $H_{2} {SO}_{4}$ because acid fog is formed, which is difficult to condense.

CHXI11:THE P-BLOCK ELEMENTS

317046 On adding ${Na}_{2} S$ to sodium nitroprusside solution

1

{Na}_{4} [Fe (CN)_{5} NOS]

complex is formed

2

{[Fe (CN)_{5} NOS]}^{4 -}

complex ion is formed

3 A violet colour is formed

4 All of these

Explanation:

On adding ${Na}_{2} S$ to sodium nitroprusside solution, following reaction occurs:
$N a_{2} [F e (C N)_{5} N O] + N a_{2} S \to N a_{4} [\underset{v i o l e t c o m p l e x}{F e (C N)_{5} N O S}]$