Introduction to Group 13 Elements
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CHXI11:THE P-BLOCK ELEMENTS

316584 The property which is not true about fluorine is

1 most of its reactions are exothermic
2 it forms only one oxo acid
3 highest electronegativity
4 high \({\rm{F}}\,\,{\rm{ - }}\,\,{\rm{F}}\) bond dissociation enthalpy.
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316585 The example/s to show the anomalous behaviour of fluorine is

1 HF is liquid while other hydrohalides are gases.
2 Fluorine exhibits only (-1) oxidate state in its compounds.
3 Flourine reacts with water gives oxygen while other halogens do not
4 All the above
CHXI11:THE P-BLOCK ELEMENTS

316586 The anomalous behaviour of fluorine is due to

1 Its small size
2 Its highest electronegativity
3 Low F - F bond dissociation enthalpy and non-availability of d-orbitals in valence shell
4 All of the above
CHXI11:THE P-BLOCK ELEMENTS

316587 Consider the following statements.
I. Due to maximum effective nuclear charge, the halogens have the smallest atomic radii in their respective periods.
II. These have low ionisation enthalpy.
III. Halogens have maximum negative electron gain enthalpy.
IV. Fluorine is the most electronegative element in the periodic Table.
The correct statements are

1 I, II, III, IV
2 I, II, III
3 I, III, IV
4 II, III, IV
CHXI11:THE P-BLOCK ELEMENTS

316588 Assertion :
F atom has less negative electron affinity than \(\mathrm{Cl}\) atom.
Reason :
Additional electrons are repelled more effectively by \(3 \mathrm{p}\) - electrons in \(\mathrm{Cl}\) than by \(2 \mathrm{p-}\) electrons in \(\mathrm{F}\) atom.

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.
NEET DIGITAL LIBRARY
CHXI11:THE P-BLOCK ELEMENTS

316584 The property which is not true about fluorine is

1 most of its reactions are exothermic
2 it forms only one oxo acid
3 highest electronegativity
4 high \({\rm{F}}\,\,{\rm{ - }}\,\,{\rm{F}}\) bond dissociation enthalpy.
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316585 The example/s to show the anomalous behaviour of fluorine is

1 HF is liquid while other hydrohalides are gases.
2 Fluorine exhibits only (-1) oxidate state in its compounds.
3 Flourine reacts with water gives oxygen while other halogens do not
4 All the above
CHXI11:THE P-BLOCK ELEMENTS

316586 The anomalous behaviour of fluorine is due to

1 Its small size
2 Its highest electronegativity
3 Low F - F bond dissociation enthalpy and non-availability of d-orbitals in valence shell
4 All of the above
CHXI11:THE P-BLOCK ELEMENTS

316587 Consider the following statements.
I. Due to maximum effective nuclear charge, the halogens have the smallest atomic radii in their respective periods.
II. These have low ionisation enthalpy.
III. Halogens have maximum negative electron gain enthalpy.
IV. Fluorine is the most electronegative element in the periodic Table.
The correct statements are

1 I, II, III, IV
2 I, II, III
3 I, III, IV
4 II, III, IV
CHXI11:THE P-BLOCK ELEMENTS

316588 Assertion :
F atom has less negative electron affinity than \(\mathrm{Cl}\) atom.
Reason :
Additional electrons are repelled more effectively by \(3 \mathrm{p}\) - electrons in \(\mathrm{Cl}\) than by \(2 \mathrm{p-}\) electrons in \(\mathrm{F}\) atom.

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.
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CHXI11:THE P-BLOCK ELEMENTS

316584 The property which is not true about fluorine is

1 most of its reactions are exothermic
2 it forms only one oxo acid
3 highest electronegativity
4 high \({\rm{F}}\,\,{\rm{ - }}\,\,{\rm{F}}\) bond dissociation enthalpy.
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316585 The example/s to show the anomalous behaviour of fluorine is

1 HF is liquid while other hydrohalides are gases.
2 Fluorine exhibits only (-1) oxidate state in its compounds.
3 Flourine reacts with water gives oxygen while other halogens do not
4 All the above
CHXI11:THE P-BLOCK ELEMENTS

316586 The anomalous behaviour of fluorine is due to

1 Its small size
2 Its highest electronegativity
3 Low F - F bond dissociation enthalpy and non-availability of d-orbitals in valence shell
4 All of the above
CHXI11:THE P-BLOCK ELEMENTS

316587 Consider the following statements.
I. Due to maximum effective nuclear charge, the halogens have the smallest atomic radii in their respective periods.
II. These have low ionisation enthalpy.
III. Halogens have maximum negative electron gain enthalpy.
IV. Fluorine is the most electronegative element in the periodic Table.
The correct statements are

1 I, II, III, IV
2 I, II, III
3 I, III, IV
4 II, III, IV
CHXI11:THE P-BLOCK ELEMENTS

316588 Assertion :
F atom has less negative electron affinity than \(\mathrm{Cl}\) atom.
Reason :
Additional electrons are repelled more effectively by \(3 \mathrm{p}\) - electrons in \(\mathrm{Cl}\) than by \(2 \mathrm{p-}\) electrons in \(\mathrm{F}\) atom.

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.
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CHXI11:THE P-BLOCK ELEMENTS

316584 The property which is not true about fluorine is

1 most of its reactions are exothermic
2 it forms only one oxo acid
3 highest electronegativity
4 high \({\rm{F}}\,\,{\rm{ - }}\,\,{\rm{F}}\) bond dissociation enthalpy.
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316585 The example/s to show the anomalous behaviour of fluorine is

1 HF is liquid while other hydrohalides are gases.
2 Fluorine exhibits only (-1) oxidate state in its compounds.
3 Flourine reacts with water gives oxygen while other halogens do not
4 All the above
CHXI11:THE P-BLOCK ELEMENTS

316586 The anomalous behaviour of fluorine is due to

1 Its small size
2 Its highest electronegativity
3 Low F - F bond dissociation enthalpy and non-availability of d-orbitals in valence shell
4 All of the above
CHXI11:THE P-BLOCK ELEMENTS

316587 Consider the following statements.
I. Due to maximum effective nuclear charge, the halogens have the smallest atomic radii in their respective periods.
II. These have low ionisation enthalpy.
III. Halogens have maximum negative electron gain enthalpy.
IV. Fluorine is the most electronegative element in the periodic Table.
The correct statements are

1 I, II, III, IV
2 I, II, III
3 I, III, IV
4 II, III, IV
CHXI11:THE P-BLOCK ELEMENTS

316588 Assertion :
F atom has less negative electron affinity than \(\mathrm{Cl}\) atom.
Reason :
Additional electrons are repelled more effectively by \(3 \mathrm{p}\) - electrons in \(\mathrm{Cl}\) than by \(2 \mathrm{p-}\) electrons in \(\mathrm{F}\) atom.

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.
NEET DIGITAL LIBRARY
CHXI11:THE P-BLOCK ELEMENTS

316584 The property which is not true about fluorine is

1 most of its reactions are exothermic
2 it forms only one oxo acid
3 highest electronegativity
4 high \({\rm{F}}\,\,{\rm{ - }}\,\,{\rm{F}}\) bond dissociation enthalpy.
KCET - 2016
CHXI11:THE P-BLOCK ELEMENTS

316585 The example/s to show the anomalous behaviour of fluorine is

1 HF is liquid while other hydrohalides are gases.
2 Fluorine exhibits only (-1) oxidate state in its compounds.
3 Flourine reacts with water gives oxygen while other halogens do not
4 All the above
CHXI11:THE P-BLOCK ELEMENTS

316586 The anomalous behaviour of fluorine is due to

1 Its small size
2 Its highest electronegativity
3 Low F - F bond dissociation enthalpy and non-availability of d-orbitals in valence shell
4 All of the above
CHXI11:THE P-BLOCK ELEMENTS

316587 Consider the following statements.
I. Due to maximum effective nuclear charge, the halogens have the smallest atomic radii in their respective periods.
II. These have low ionisation enthalpy.
III. Halogens have maximum negative electron gain enthalpy.
IV. Fluorine is the most electronegative element in the periodic Table.
The correct statements are

1 I, II, III, IV
2 I, II, III
3 I, III, IV
4 II, III, IV
CHXI11:THE P-BLOCK ELEMENTS

316588 Assertion :
F atom has less negative electron affinity than \(\mathrm{Cl}\) atom.
Reason :
Additional electrons are repelled more effectively by \(3 \mathrm{p}\) - electrons in \(\mathrm{Cl}\) than by \(2 \mathrm{p-}\) electrons in \(\mathrm{F}\) atom.

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.