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CHXI11:THE P-BLOCK ELEMENTS

316944 Identify the incorrect statement:

1 In

{({Si}_{3} O_{9})}^{6 -}

, tetrahedral

{SiO}_{4}

units share two oxygen atoms.

2 Trialkylchlorosilane on hydrolysis gives

R_{3} SiOH

3

{SiCl}_{4}

undergoes hydrolysis to give

H_{4} {SiO}_{4}

4

{({Si}_{3} O_{9})}^{6 -}

has cyclic structure

Explanation:

The hydrolysis of Trialkyl chlorosilane $R_{3} SiCl$ yields dimer.
supporting img

JEE - 2013

CHXI11:THE P-BLOCK ELEMENTS

316945 Read Assertion and Reason carefully to mark the correct option given below.
Assertion :
Si - Si bond is much stronger than $Si - O$ bond.
Reason :
Si forms multiple bonds easily.

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:

$Si - O$ bond is stronger than $Si - Si$ bond because $p π - d π$ bonding is not possible between silicon atoms due to large size.

CHXI11:THE P-BLOCK ELEMENTS

316946 Method used for obtaining highly pure silicon used as a semiconductor material, is

1 Oxidation

2 Electrochemical

3 Crystallisation

4 Zone refining

Explanation:

$Si$ obtained by reduction of ${SiCl}_{4}$ with $H_{2}$ is further purified by zone refining method to get Si of very high purity.

CHXI11:THE P-BLOCK ELEMENTS

316947 A when added to silicon will give B. A and B are

1

HF, H_{2} {SiF}_{4}

2

HF, H_{2} {SiF}_{6}

3

HCl, H_{2} {SiCl}_{6}

4

HI, H_{2} {SiI}_{6}

Explanation:

$6 H F + S i \to H_{2} S i F_{6} + 2 H_{2}$
$H y d r o g e n S i l i c o n$
$F l o u r i d e (A) (B)$

CHXI11:THE P-BLOCK ELEMENTS

316944 Identify the incorrect statement:

1 In

{({Si}_{3} O_{9})}^{6 -}

, tetrahedral

{SiO}_{4}

units share two oxygen atoms.

2 Trialkylchlorosilane on hydrolysis gives

R_{3} SiOH

3

{SiCl}_{4}

undergoes hydrolysis to give

H_{4} {SiO}_{4}

4

{({Si}_{3} O_{9})}^{6 -}

has cyclic structure

Explanation:

The hydrolysis of Trialkyl chlorosilane $R_{3} SiCl$ yields dimer.
supporting img

JEE - 2013

CHXI11:THE P-BLOCK ELEMENTS

316945 Read Assertion and Reason carefully to mark the correct option given below.
Assertion :
Si - Si bond is much stronger than $Si - O$ bond.
Reason :
Si forms multiple bonds easily.

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:

$Si - O$ bond is stronger than $Si - Si$ bond because $p π - d π$ bonding is not possible between silicon atoms due to large size.

CHXI11:THE P-BLOCK ELEMENTS

316946 Method used for obtaining highly pure silicon used as a semiconductor material, is

1 Oxidation

2 Electrochemical

3 Crystallisation

4 Zone refining

Explanation:

$Si$ obtained by reduction of ${SiCl}_{4}$ with $H_{2}$ is further purified by zone refining method to get Si of very high purity.

CHXI11:THE P-BLOCK ELEMENTS

316947 A when added to silicon will give B. A and B are

1

HF, H_{2} {SiF}_{4}

2

HF, H_{2} {SiF}_{6}

3

HCl, H_{2} {SiCl}_{6}

4

HI, H_{2} {SiI}_{6}

Explanation:

$6 H F + S i \to H_{2} S i F_{6} + 2 H_{2}$
$H y d r o g e n S i l i c o n$
$F l o u r i d e (A) (B)$

CHXI11:THE P-BLOCK ELEMENTS

316944 Identify the incorrect statement:

1 In

{({Si}_{3} O_{9})}^{6 -}

, tetrahedral

{SiO}_{4}

units share two oxygen atoms.

2 Trialkylchlorosilane on hydrolysis gives

R_{3} SiOH

3

{SiCl}_{4}

undergoes hydrolysis to give

H_{4} {SiO}_{4}

4

{({Si}_{3} O_{9})}^{6 -}

has cyclic structure

Explanation:

The hydrolysis of Trialkyl chlorosilane $R_{3} SiCl$ yields dimer.
supporting img

JEE - 2013

CHXI11:THE P-BLOCK ELEMENTS

316945 Read Assertion and Reason carefully to mark the correct option given below.
Assertion :
Si - Si bond is much stronger than $Si - O$ bond.
Reason :
Si forms multiple bonds easily.

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:

$Si - O$ bond is stronger than $Si - Si$ bond because $p π - d π$ bonding is not possible between silicon atoms due to large size.

CHXI11:THE P-BLOCK ELEMENTS

316946 Method used for obtaining highly pure silicon used as a semiconductor material, is

1 Oxidation

2 Electrochemical

3 Crystallisation

4 Zone refining

Explanation:

$Si$ obtained by reduction of ${SiCl}_{4}$ with $H_{2}$ is further purified by zone refining method to get Si of very high purity.

CHXI11:THE P-BLOCK ELEMENTS

316947 A when added to silicon will give B. A and B are

1

HF, H_{2} {SiF}_{4}

2

HF, H_{2} {SiF}_{6}

3

HCl, H_{2} {SiCl}_{6}

4

HI, H_{2} {SiI}_{6}

Explanation:

$6 H F + S i \to H_{2} S i F_{6} + 2 H_{2}$
$H y d r o g e n S i l i c o n$
$F l o u r i d e (A) (B)$

CHXI11:THE P-BLOCK ELEMENTS

316944 Identify the incorrect statement:

1 In

{({Si}_{3} O_{9})}^{6 -}

, tetrahedral

{SiO}_{4}

units share two oxygen atoms.

2 Trialkylchlorosilane on hydrolysis gives

R_{3} SiOH

3

{SiCl}_{4}

undergoes hydrolysis to give

H_{4} {SiO}_{4}

4

{({Si}_{3} O_{9})}^{6 -}

has cyclic structure

Explanation:

The hydrolysis of Trialkyl chlorosilane $R_{3} SiCl$ yields dimer.
supporting img

JEE - 2013

CHXI11:THE P-BLOCK ELEMENTS

316945 Read Assertion and Reason carefully to mark the correct option given below.
Assertion :
Si - Si bond is much stronger than $Si - O$ bond.
Reason :
Si forms multiple bonds easily.

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:

$Si - O$ bond is stronger than $Si - Si$ bond because $p π - d π$ bonding is not possible between silicon atoms due to large size.

CHXI11:THE P-BLOCK ELEMENTS

316946 Method used for obtaining highly pure silicon used as a semiconductor material, is

1 Oxidation

2 Electrochemical

3 Crystallisation

4 Zone refining

Explanation:

$Si$ obtained by reduction of ${SiCl}_{4}$ with $H_{2}$ is further purified by zone refining method to get Si of very high purity.

CHXI11:THE P-BLOCK ELEMENTS

316947 A when added to silicon will give B. A and B are

1

HF, H_{2} {SiF}_{4}

2

HF, H_{2} {SiF}_{6}

3

HCl, H_{2} {SiCl}_{6}

4

HI, H_{2} {SiI}_{6}

Explanation:

$6 H F + S i \to H_{2} S i F_{6} + 2 H_{2}$
$H y d r o g e n S i l i c o n$
$F l o u r i d e (A) (B)$