Chemical Properties and General Characteristics of Group – 13 Elements
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CHXI11:THE P-BLOCK ELEMENTS

316324 Which of the following oxides is amphoteric in character?

1 \(\mathrm{CaO}\)
2 \(\mathrm{CO}_{2}\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{SnO}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316325 Carbon dioxide is a gaseous molecule while \(\mathrm{SiO}_{2}\) is a three dimensional-network solid because

1 \(\mathrm{CO}_{2}\) molecules are held by strong Vander Waal's forces whereas \(\mathrm{SiO}_{2}\) is an ionic solid
2 \(\mathrm{CO}_{2}\) exists as a discrete molecule due to the formation of double bonds between the carbon and oxygen atoms by \(2 p_{\pi}-2 p_{\pi}\) bonding while silicon cannot form such double bonds with oxygen because the \(3 p_{\pi} 2 p_{\pi}\) overlap is not efficient; thus \(\mathrm{SiO}_{2}\) forms an infinite three-dimensional structure.
3 \(\mathrm{CO}_{2}\) molecules are held by \(2 p-3 p_{\pi}-\) bonding and \(\mathrm{SiO}_{2}\) molecules are held by \(3 p-3 d \pi\) overlap, thus \(\mathrm{SiO}_{2}\) forms an infinite threedimensional structure
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316326 The element that does not form a monoxide is

1 Lead
2 Tin
3 Germanium
4 Silicon
CHXI11:THE P-BLOCK ELEMENTS

316327 Which of the following statement is false?

1 Dry ice is solid \(\mathrm{CO}_{2}\)
2 \(\mathrm{CO}_{2}\) is weakly acidic
3 \(\mathrm{CO}_{2}\) and \(\mathrm{SiO}_{2}\) are linear molecules
4 \(\mathrm{CO}_{2}\) is a gas while \(\mathrm{SiO}_{2}\) is solid
CHXI11:THE P-BLOCK ELEMENTS

316328 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
\({\mathrm{\mathrm{\mathrm{SiO}_{2}}}}\) and \({\mathrm{\mathrm{\mathrm{GeO}_{2}}}}\) are acidic while SnO and PbO are amphoteric in nature.
Statement B :
Allotropic forms of carbon are due to property of catenation and \({\mathrm{\mathrm{\mathrm{p} \pi-\mathrm{d} \pi}}}\) bond formation.

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.
JEE Main - 2024
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CHXI11:THE P-BLOCK ELEMENTS

316324 Which of the following oxides is amphoteric in character?

1 \(\mathrm{CaO}\)
2 \(\mathrm{CO}_{2}\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{SnO}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316325 Carbon dioxide is a gaseous molecule while \(\mathrm{SiO}_{2}\) is a three dimensional-network solid because

1 \(\mathrm{CO}_{2}\) molecules are held by strong Vander Waal's forces whereas \(\mathrm{SiO}_{2}\) is an ionic solid
2 \(\mathrm{CO}_{2}\) exists as a discrete molecule due to the formation of double bonds between the carbon and oxygen atoms by \(2 p_{\pi}-2 p_{\pi}\) bonding while silicon cannot form such double bonds with oxygen because the \(3 p_{\pi} 2 p_{\pi}\) overlap is not efficient; thus \(\mathrm{SiO}_{2}\) forms an infinite three-dimensional structure.
3 \(\mathrm{CO}_{2}\) molecules are held by \(2 p-3 p_{\pi}-\) bonding and \(\mathrm{SiO}_{2}\) molecules are held by \(3 p-3 d \pi\) overlap, thus \(\mathrm{SiO}_{2}\) forms an infinite threedimensional structure
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316326 The element that does not form a monoxide is

1 Lead
2 Tin
3 Germanium
4 Silicon
CHXI11:THE P-BLOCK ELEMENTS

316327 Which of the following statement is false?

1 Dry ice is solid \(\mathrm{CO}_{2}\)
2 \(\mathrm{CO}_{2}\) is weakly acidic
3 \(\mathrm{CO}_{2}\) and \(\mathrm{SiO}_{2}\) are linear molecules
4 \(\mathrm{CO}_{2}\) is a gas while \(\mathrm{SiO}_{2}\) is solid
CHXI11:THE P-BLOCK ELEMENTS

316328 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
\({\mathrm{\mathrm{\mathrm{SiO}_{2}}}}\) and \({\mathrm{\mathrm{\mathrm{GeO}_{2}}}}\) are acidic while SnO and PbO are amphoteric in nature.
Statement B :
Allotropic forms of carbon are due to property of catenation and \({\mathrm{\mathrm{\mathrm{p} \pi-\mathrm{d} \pi}}}\) bond formation.

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.
JEE Main - 2024
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CHXI11:THE P-BLOCK ELEMENTS

316324 Which of the following oxides is amphoteric in character?

1 \(\mathrm{CaO}\)
2 \(\mathrm{CO}_{2}\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{SnO}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316325 Carbon dioxide is a gaseous molecule while \(\mathrm{SiO}_{2}\) is a three dimensional-network solid because

1 \(\mathrm{CO}_{2}\) molecules are held by strong Vander Waal's forces whereas \(\mathrm{SiO}_{2}\) is an ionic solid
2 \(\mathrm{CO}_{2}\) exists as a discrete molecule due to the formation of double bonds between the carbon and oxygen atoms by \(2 p_{\pi}-2 p_{\pi}\) bonding while silicon cannot form such double bonds with oxygen because the \(3 p_{\pi} 2 p_{\pi}\) overlap is not efficient; thus \(\mathrm{SiO}_{2}\) forms an infinite three-dimensional structure.
3 \(\mathrm{CO}_{2}\) molecules are held by \(2 p-3 p_{\pi}-\) bonding and \(\mathrm{SiO}_{2}\) molecules are held by \(3 p-3 d \pi\) overlap, thus \(\mathrm{SiO}_{2}\) forms an infinite threedimensional structure
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316326 The element that does not form a monoxide is

1 Lead
2 Tin
3 Germanium
4 Silicon
CHXI11:THE P-BLOCK ELEMENTS

316327 Which of the following statement is false?

1 Dry ice is solid \(\mathrm{CO}_{2}\)
2 \(\mathrm{CO}_{2}\) is weakly acidic
3 \(\mathrm{CO}_{2}\) and \(\mathrm{SiO}_{2}\) are linear molecules
4 \(\mathrm{CO}_{2}\) is a gas while \(\mathrm{SiO}_{2}\) is solid
CHXI11:THE P-BLOCK ELEMENTS

316328 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
\({\mathrm{\mathrm{\mathrm{SiO}_{2}}}}\) and \({\mathrm{\mathrm{\mathrm{GeO}_{2}}}}\) are acidic while SnO and PbO are amphoteric in nature.
Statement B :
Allotropic forms of carbon are due to property of catenation and \({\mathrm{\mathrm{\mathrm{p} \pi-\mathrm{d} \pi}}}\) bond formation.

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.
JEE Main - 2024
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CHXI11:THE P-BLOCK ELEMENTS

316324 Which of the following oxides is amphoteric in character?

1 \(\mathrm{CaO}\)
2 \(\mathrm{CO}_{2}\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{SnO}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316325 Carbon dioxide is a gaseous molecule while \(\mathrm{SiO}_{2}\) is a three dimensional-network solid because

1 \(\mathrm{CO}_{2}\) molecules are held by strong Vander Waal's forces whereas \(\mathrm{SiO}_{2}\) is an ionic solid
2 \(\mathrm{CO}_{2}\) exists as a discrete molecule due to the formation of double bonds between the carbon and oxygen atoms by \(2 p_{\pi}-2 p_{\pi}\) bonding while silicon cannot form such double bonds with oxygen because the \(3 p_{\pi} 2 p_{\pi}\) overlap is not efficient; thus \(\mathrm{SiO}_{2}\) forms an infinite three-dimensional structure.
3 \(\mathrm{CO}_{2}\) molecules are held by \(2 p-3 p_{\pi}-\) bonding and \(\mathrm{SiO}_{2}\) molecules are held by \(3 p-3 d \pi\) overlap, thus \(\mathrm{SiO}_{2}\) forms an infinite threedimensional structure
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316326 The element that does not form a monoxide is

1 Lead
2 Tin
3 Germanium
4 Silicon
CHXI11:THE P-BLOCK ELEMENTS

316327 Which of the following statement is false?

1 Dry ice is solid \(\mathrm{CO}_{2}\)
2 \(\mathrm{CO}_{2}\) is weakly acidic
3 \(\mathrm{CO}_{2}\) and \(\mathrm{SiO}_{2}\) are linear molecules
4 \(\mathrm{CO}_{2}\) is a gas while \(\mathrm{SiO}_{2}\) is solid
CHXI11:THE P-BLOCK ELEMENTS

316328 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
\({\mathrm{\mathrm{\mathrm{SiO}_{2}}}}\) and \({\mathrm{\mathrm{\mathrm{GeO}_{2}}}}\) are acidic while SnO and PbO are amphoteric in nature.
Statement B :
Allotropic forms of carbon are due to property of catenation and \({\mathrm{\mathrm{\mathrm{p} \pi-\mathrm{d} \pi}}}\) bond formation.

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.
JEE Main - 2024
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CHXI11:THE P-BLOCK ELEMENTS

316324 Which of the following oxides is amphoteric in character?

1 \(\mathrm{CaO}\)
2 \(\mathrm{CO}_{2}\)
3 \(\mathrm{SiO}_{2}\)
4 \(\mathrm{SnO}_{2}\)
CHXI11:THE P-BLOCK ELEMENTS

316325 Carbon dioxide is a gaseous molecule while \(\mathrm{SiO}_{2}\) is a three dimensional-network solid because

1 \(\mathrm{CO}_{2}\) molecules are held by strong Vander Waal's forces whereas \(\mathrm{SiO}_{2}\) is an ionic solid
2 \(\mathrm{CO}_{2}\) exists as a discrete molecule due to the formation of double bonds between the carbon and oxygen atoms by \(2 p_{\pi}-2 p_{\pi}\) bonding while silicon cannot form such double bonds with oxygen because the \(3 p_{\pi} 2 p_{\pi}\) overlap is not efficient; thus \(\mathrm{SiO}_{2}\) forms an infinite three-dimensional structure.
3 \(\mathrm{CO}_{2}\) molecules are held by \(2 p-3 p_{\pi}-\) bonding and \(\mathrm{SiO}_{2}\) molecules are held by \(3 p-3 d \pi\) overlap, thus \(\mathrm{SiO}_{2}\) forms an infinite threedimensional structure
4 None of these
CHXI11:THE P-BLOCK ELEMENTS

316326 The element that does not form a monoxide is

1 Lead
2 Tin
3 Germanium
4 Silicon
CHXI11:THE P-BLOCK ELEMENTS

316327 Which of the following statement is false?

1 Dry ice is solid \(\mathrm{CO}_{2}\)
2 \(\mathrm{CO}_{2}\) is weakly acidic
3 \(\mathrm{CO}_{2}\) and \(\mathrm{SiO}_{2}\) are linear molecules
4 \(\mathrm{CO}_{2}\) is a gas while \(\mathrm{SiO}_{2}\) is solid
CHXI11:THE P-BLOCK ELEMENTS

316328 Read the Statement - A and Statement - B carefully to mark the correct options given below
Statement A :
\({\mathrm{\mathrm{\mathrm{SiO}_{2}}}}\) and \({\mathrm{\mathrm{\mathrm{GeO}_{2}}}}\) are acidic while SnO and PbO are amphoteric in nature.
Statement B :
Allotropic forms of carbon are due to property of catenation and \({\mathrm{\mathrm{\mathrm{p} \pi-\mathrm{d} \pi}}}\) bond formation.

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.
JEE Main - 2024