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CHXI11:THE P-BLOCK ELEMENTS

316626 Match Column I (Substances) with Column II (Processes employed in the manufacture of the substances) and select the correct option.
supporting img

1

A - P, B - S, C - Q, D - R

2

A - P, B - Q, C - R, D - S

3

A - S, B - R, C - Q, D - P

4

A - S, B - Q, C - R, D - P

Explanation:

Sulphuric acid is manufactured by Contact process, steel is manufactured by Bessemer's process, Ostwald's process is used for the production of ${HNO}_{3}$ while ${NH}_{3}$ is obtained by Haber's process.

CHXI11:THE P-BLOCK ELEMENTS

316627 Correct bond angles are in the order of

1

{OF}_{2} > {OCl}_{2} > H_{2} O > {ClO}_{2}

2

{ClO}_{2} > {Cl}_{2} O > H_{2} O > {OF}_{2}

3

{OF}_{2} > H_{2} O > {Cl}_{2} O > {ClO}_{2}

4

H_{2} O > {OF}_{2} > {Cl}_{2} O > {ClO}_{2}

Explanation:

In ${ClO}_{2}$ , due to larger size of chlorine atom, repulsion between non-bonding electrons on the chlorine atoms overcome the lone pairlone pair repulsion. Hence, the order of bond angle is
${ClO}_{2} > {Cl}_{2} O > H_{2} O > {OF}_{2} .$

CHXI11:THE P-BLOCK ELEMENTS

316641 In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it ?

1

H_{2} O < H_{2} S < H_{2} Se < H_{2} Te

: Increasing

{pK}_{a}

values

2

{NH}_{3} < {PH}_{3} < {AsH}_{3} < {SbH}_{3}

: Increasing acidic character

3

{CO}_{2} < {SiO}_{2} < {SnO}_{2} < {PbO}_{2}

: Increasing oxidizing power

4

HF < HCl < HBr < HI

: Increasing acidic strength

Explanation:

Acidic strength of Hydra acid increase from top to bottom in a group and $pKa$ value decrease.
So, ${pK}_{a}$ order is $H_{2} O > H_{2} S > H_{2} Se > H_{2} Te$

NEET - 2021

CHXI11:THE P-BLOCK ELEMENTS

316628 How many of the following are mixed oxides?
${Pb}_{3} O_{4}, {KO}_{2}, H_{2} O_{2}, {Al}_{2} O_{3}, {Fe}_{3} O_{4}, N_{2} O, {Mn}_{3} O_{4}$

1 1

2 2

3 3

4 4

Explanation:

Mixed oxides are formed from two simple oxides.
${Pb}_{3} O_{4} (2 PbO + {PbO}_{2})$
${Fe}_{3} O_{4} (FeO + {Fe}_{2} O_{3})$
${Mn}_{3} O_{4} ({MnO}_{2} + 2 MnO)$

CHXI11:THE P-BLOCK ELEMENTS

316626 Match Column I (Substances) with Column II (Processes employed in the manufacture of the substances) and select the correct option.
supporting img

1

A - P, B - S, C - Q, D - R

2

A - P, B - Q, C - R, D - S

3

A - S, B - R, C - Q, D - P

4

A - S, B - Q, C - R, D - P

Explanation:

Sulphuric acid is manufactured by Contact process, steel is manufactured by Bessemer's process, Ostwald's process is used for the production of ${HNO}_{3}$ while ${NH}_{3}$ is obtained by Haber's process.

CHXI11:THE P-BLOCK ELEMENTS

316627 Correct bond angles are in the order of

1

{OF}_{2} > {OCl}_{2} > H_{2} O > {ClO}_{2}

2

{ClO}_{2} > {Cl}_{2} O > H_{2} O > {OF}_{2}

3

{OF}_{2} > H_{2} O > {Cl}_{2} O > {ClO}_{2}

4

H_{2} O > {OF}_{2} > {Cl}_{2} O > {ClO}_{2}

Explanation:

In ${ClO}_{2}$ , due to larger size of chlorine atom, repulsion between non-bonding electrons on the chlorine atoms overcome the lone pairlone pair repulsion. Hence, the order of bond angle is
${ClO}_{2} > {Cl}_{2} O > H_{2} O > {OF}_{2} .$

CHXI11:THE P-BLOCK ELEMENTS

316641 In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it ?

1

H_{2} O < H_{2} S < H_{2} Se < H_{2} Te

: Increasing

{pK}_{a}

values

2

{NH}_{3} < {PH}_{3} < {AsH}_{3} < {SbH}_{3}

: Increasing acidic character

3

{CO}_{2} < {SiO}_{2} < {SnO}_{2} < {PbO}_{2}

: Increasing oxidizing power

4

HF < HCl < HBr < HI

: Increasing acidic strength

Explanation:

Acidic strength of Hydra acid increase from top to bottom in a group and $pKa$ value decrease.
So, ${pK}_{a}$ order is $H_{2} O > H_{2} S > H_{2} Se > H_{2} Te$

NEET - 2021

CHXI11:THE P-BLOCK ELEMENTS

316628 How many of the following are mixed oxides?
${Pb}_{3} O_{4}, {KO}_{2}, H_{2} O_{2}, {Al}_{2} O_{3}, {Fe}_{3} O_{4}, N_{2} O, {Mn}_{3} O_{4}$

1 1

2 2

3 3

4 4

Explanation:

Mixed oxides are formed from two simple oxides.
${Pb}_{3} O_{4} (2 PbO + {PbO}_{2})$
${Fe}_{3} O_{4} (FeO + {Fe}_{2} O_{3})$
${Mn}_{3} O_{4} ({MnO}_{2} + 2 MnO)$

CHXI11:THE P-BLOCK ELEMENTS

316626 Match Column I (Substances) with Column II (Processes employed in the manufacture of the substances) and select the correct option.
supporting img

1

A - P, B - S, C - Q, D - R

2

A - P, B - Q, C - R, D - S

3

A - S, B - R, C - Q, D - P

4

A - S, B - Q, C - R, D - P

Explanation:

Sulphuric acid is manufactured by Contact process, steel is manufactured by Bessemer's process, Ostwald's process is used for the production of ${HNO}_{3}$ while ${NH}_{3}$ is obtained by Haber's process.

CHXI11:THE P-BLOCK ELEMENTS

316627 Correct bond angles are in the order of

1

{OF}_{2} > {OCl}_{2} > H_{2} O > {ClO}_{2}

2

{ClO}_{2} > {Cl}_{2} O > H_{2} O > {OF}_{2}

3

{OF}_{2} > H_{2} O > {Cl}_{2} O > {ClO}_{2}

4

H_{2} O > {OF}_{2} > {Cl}_{2} O > {ClO}_{2}

Explanation:

In ${ClO}_{2}$ , due to larger size of chlorine atom, repulsion between non-bonding electrons on the chlorine atoms overcome the lone pairlone pair repulsion. Hence, the order of bond angle is
${ClO}_{2} > {Cl}_{2} O > H_{2} O > {OF}_{2} .$

CHXI11:THE P-BLOCK ELEMENTS

316641 In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it ?

1

H_{2} O < H_{2} S < H_{2} Se < H_{2} Te

: Increasing

{pK}_{a}

values

2

{NH}_{3} < {PH}_{3} < {AsH}_{3} < {SbH}_{3}

: Increasing acidic character

3

{CO}_{2} < {SiO}_{2} < {SnO}_{2} < {PbO}_{2}

: Increasing oxidizing power

4

HF < HCl < HBr < HI

: Increasing acidic strength

Explanation:

Acidic strength of Hydra acid increase from top to bottom in a group and $pKa$ value decrease.
So, ${pK}_{a}$ order is $H_{2} O > H_{2} S > H_{2} Se > H_{2} Te$

NEET - 2021

CHXI11:THE P-BLOCK ELEMENTS

316628 How many of the following are mixed oxides?
${Pb}_{3} O_{4}, {KO}_{2}, H_{2} O_{2}, {Al}_{2} O_{3}, {Fe}_{3} O_{4}, N_{2} O, {Mn}_{3} O_{4}$

1 1

2 2

3 3

4 4

Explanation:

Mixed oxides are formed from two simple oxides.
${Pb}_{3} O_{4} (2 PbO + {PbO}_{2})$
${Fe}_{3} O_{4} (FeO + {Fe}_{2} O_{3})$
${Mn}_{3} O_{4} ({MnO}_{2} + 2 MnO)$

CHXI11:THE P-BLOCK ELEMENTS

316626 Match Column I (Substances) with Column II (Processes employed in the manufacture of the substances) and select the correct option.
supporting img

1

A - P, B - S, C - Q, D - R

2

A - P, B - Q, C - R, D - S

3

A - S, B - R, C - Q, D - P

4

A - S, B - Q, C - R, D - P

Explanation:

Sulphuric acid is manufactured by Contact process, steel is manufactured by Bessemer's process, Ostwald's process is used for the production of ${HNO}_{3}$ while ${NH}_{3}$ is obtained by Haber's process.

CHXI11:THE P-BLOCK ELEMENTS

316627 Correct bond angles are in the order of

1

{OF}_{2} > {OCl}_{2} > H_{2} O > {ClO}_{2}

2

{ClO}_{2} > {Cl}_{2} O > H_{2} O > {OF}_{2}

3

{OF}_{2} > H_{2} O > {Cl}_{2} O > {ClO}_{2}

4

H_{2} O > {OF}_{2} > {Cl}_{2} O > {ClO}_{2}

Explanation:

In ${ClO}_{2}$ , due to larger size of chlorine atom, repulsion between non-bonding electrons on the chlorine atoms overcome the lone pairlone pair repulsion. Hence, the order of bond angle is
${ClO}_{2} > {Cl}_{2} O > H_{2} O > {OF}_{2} .$

CHXI11:THE P-BLOCK ELEMENTS

316641 In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it ?

1

H_{2} O < H_{2} S < H_{2} Se < H_{2} Te

: Increasing

{pK}_{a}

values

2

{NH}_{3} < {PH}_{3} < {AsH}_{3} < {SbH}_{3}

: Increasing acidic character

3

{CO}_{2} < {SiO}_{2} < {SnO}_{2} < {PbO}_{2}

: Increasing oxidizing power

4

HF < HCl < HBr < HI

: Increasing acidic strength

Explanation:

Acidic strength of Hydra acid increase from top to bottom in a group and $pKa$ value decrease.
So, ${pK}_{a}$ order is $H_{2} O > H_{2} S > H_{2} Se > H_{2} Te$

NEET - 2021

CHXI11:THE P-BLOCK ELEMENTS

316628 How many of the following are mixed oxides?
${Pb}_{3} O_{4}, {KO}_{2}, H_{2} O_{2}, {Al}_{2} O_{3}, {Fe}_{3} O_{4}, N_{2} O, {Mn}_{3} O_{4}$

1 1

2 2

3 3

4 4

Explanation:

Mixed oxides are formed from two simple oxides.
${Pb}_{3} O_{4} (2 PbO + {PbO}_{2})$
${Fe}_{3} O_{4} (FeO + {Fe}_{2} O_{3})$
${Mn}_{3} O_{4} ({MnO}_{2} + 2 MnO)$