Octet Rule and Its Limitations
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313795 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
The Lewis dot structures provide a picture of bonding in molecules and ions in terms of the shared pairs of electrons and the octet rule.
Statement B :
Octet rule explains the formation of compounds of inert gases such as
\(\mathrm{XeF}_2, \mathrm{XeO}_4\) etc.

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
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313796 How many of the following compounds violate octet rule?
\[\begin{array}{*{20}{l}}
{{\rm{(i)Br}}{{\rm{F}}_{\rm{5}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(ii)S}}{{\rm{F}}_{\rm{6}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iii)I}}{{\rm{F}}_{\rm{7}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iv)XeO}}{{\rm{F}}_{\rm{4}}}}\\
{{\rm{(v)Cl}}{{\rm{F}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(vi)PC}}{{\rm{l}}_{\rm{4}}}^ \oplus }
\end{array}\]

1 2
2 4
3 5
4 6
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313797 Which of the following species follows the octet rule for all of its atoms?

1 \(\mathrm{BeH}_{2}\)-dimer
2 \(\mathrm{TeF}_{6}\)
3 \(\mathrm{XeF}_{6}\)
4 \(\mathrm{C}_{2} \mathrm{~F}_{6}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313798 Which one of the following is an electron deficient compound ?

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
2 \({\rm{AlC}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
4 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313799 Which of the following compound does not follow octet rule?

1 \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 \({\rm{PC}}{{\rm{l}}_{\rm{3}}}\)
3 \({\rm{ICl}}\)
4 \({\rm{Cl}}{{\rm{F}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313795 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
The Lewis dot structures provide a picture of bonding in molecules and ions in terms of the shared pairs of electrons and the octet rule.
Statement B :
Octet rule explains the formation of compounds of inert gases such as
\(\mathrm{XeF}_2, \mathrm{XeO}_4\) etc.

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
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313796 How many of the following compounds violate octet rule?
\[\begin{array}{*{20}{l}}
{{\rm{(i)Br}}{{\rm{F}}_{\rm{5}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(ii)S}}{{\rm{F}}_{\rm{6}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iii)I}}{{\rm{F}}_{\rm{7}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iv)XeO}}{{\rm{F}}_{\rm{4}}}}\\
{{\rm{(v)Cl}}{{\rm{F}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(vi)PC}}{{\rm{l}}_{\rm{4}}}^ \oplus }
\end{array}\]

1 2
2 4
3 5
4 6
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313797 Which of the following species follows the octet rule for all of its atoms?

1 \(\mathrm{BeH}_{2}\)-dimer
2 \(\mathrm{TeF}_{6}\)
3 \(\mathrm{XeF}_{6}\)
4 \(\mathrm{C}_{2} \mathrm{~F}_{6}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313798 Which one of the following is an electron deficient compound ?

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
2 \({\rm{AlC}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
4 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313799 Which of the following compound does not follow octet rule?

1 \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 \({\rm{PC}}{{\rm{l}}_{\rm{3}}}\)
3 \({\rm{ICl}}\)
4 \({\rm{Cl}}{{\rm{F}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313795 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
The Lewis dot structures provide a picture of bonding in molecules and ions in terms of the shared pairs of electrons and the octet rule.
Statement B :
Octet rule explains the formation of compounds of inert gases such as
\(\mathrm{XeF}_2, \mathrm{XeO}_4\) etc.

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
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313796 How many of the following compounds violate octet rule?
\[\begin{array}{*{20}{l}}
{{\rm{(i)Br}}{{\rm{F}}_{\rm{5}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(ii)S}}{{\rm{F}}_{\rm{6}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iii)I}}{{\rm{F}}_{\rm{7}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iv)XeO}}{{\rm{F}}_{\rm{4}}}}\\
{{\rm{(v)Cl}}{{\rm{F}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(vi)PC}}{{\rm{l}}_{\rm{4}}}^ \oplus }
\end{array}\]

1 2
2 4
3 5
4 6
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313797 Which of the following species follows the octet rule for all of its atoms?

1 \(\mathrm{BeH}_{2}\)-dimer
2 \(\mathrm{TeF}_{6}\)
3 \(\mathrm{XeF}_{6}\)
4 \(\mathrm{C}_{2} \mathrm{~F}_{6}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313798 Which one of the following is an electron deficient compound ?

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
2 \({\rm{AlC}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
4 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313799 Which of the following compound does not follow octet rule?

1 \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 \({\rm{PC}}{{\rm{l}}_{\rm{3}}}\)
3 \({\rm{ICl}}\)
4 \({\rm{Cl}}{{\rm{F}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313795 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
The Lewis dot structures provide a picture of bonding in molecules and ions in terms of the shared pairs of electrons and the octet rule.
Statement B :
Octet rule explains the formation of compounds of inert gases such as
\(\mathrm{XeF}_2, \mathrm{XeO}_4\) etc.

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
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313796 How many of the following compounds violate octet rule?
\[\begin{array}{*{20}{l}}
{{\rm{(i)Br}}{{\rm{F}}_{\rm{5}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(ii)S}}{{\rm{F}}_{\rm{6}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iii)I}}{{\rm{F}}_{\rm{7}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iv)XeO}}{{\rm{F}}_{\rm{4}}}}\\
{{\rm{(v)Cl}}{{\rm{F}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(vi)PC}}{{\rm{l}}_{\rm{4}}}^ \oplus }
\end{array}\]

1 2
2 4
3 5
4 6
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313797 Which of the following species follows the octet rule for all of its atoms?

1 \(\mathrm{BeH}_{2}\)-dimer
2 \(\mathrm{TeF}_{6}\)
3 \(\mathrm{XeF}_{6}\)
4 \(\mathrm{C}_{2} \mathrm{~F}_{6}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313798 Which one of the following is an electron deficient compound ?

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
2 \({\rm{AlC}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
4 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313799 Which of the following compound does not follow octet rule?

1 \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 \({\rm{PC}}{{\rm{l}}_{\rm{3}}}\)
3 \({\rm{ICl}}\)
4 \({\rm{Cl}}{{\rm{F}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313795 Read the Statement - A and Statement - B carefully to mark the correct options given below:
Statement A :
The Lewis dot structures provide a picture of bonding in molecules and ions in terms of the shared pairs of electrons and the octet rule.
Statement B :
Octet rule explains the formation of compounds of inert gases such as
\(\mathrm{XeF}_2, \mathrm{XeO}_4\) etc.

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
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313796 How many of the following compounds violate octet rule?
\[\begin{array}{*{20}{l}}
{{\rm{(i)Br}}{{\rm{F}}_{\rm{5}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(ii)S}}{{\rm{F}}_{\rm{6}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iii)I}}{{\rm{F}}_{\rm{7}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(iv)XeO}}{{\rm{F}}_{\rm{4}}}}\\
{{\rm{(v)Cl}}{{\rm{F}}_{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\rm{(vi)PC}}{{\rm{l}}_{\rm{4}}}^ \oplus }
\end{array}\]

1 2
2 4
3 5
4 6
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313797 Which of the following species follows the octet rule for all of its atoms?

1 \(\mathrm{BeH}_{2}\)-dimer
2 \(\mathrm{TeF}_{6}\)
3 \(\mathrm{XeF}_{6}\)
4 \(\mathrm{C}_{2} \mathrm{~F}_{6}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313798 Which one of the following is an electron deficient compound ?

1 \({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{2}}}\)
2 \({\rm{AlC}}{{\rm{l}}_{\rm{3}}}\)
3 \({{\rm{H}}_{\rm{2}}}{\rm{O}}\)
4 \({\rm{N}}{{\rm{H}}_{\rm{3}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313799 Which of the following compound does not follow octet rule?

1 \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
2 \({\rm{PC}}{{\rm{l}}_{\rm{3}}}\)
3 \({\rm{ICl}}\)
4 \({\rm{Cl}}{{\rm{F}}_{\rm{3}}}\)