CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313233
Select the group where electronegativity increases down the group
1 \(\mathrm{Ca}, \mathrm{Sr}\), and Ba
2 \(\mathrm{Zn}, \mathrm{Cd}\), and Hg
3 \(\mathrm{F}, \mathrm{Cl}\), and Br
4 Li, Na, and K
Explanation:
In \(\mathrm{Zn}, \mathrm{Cd}\), and Hg , electronegativity increases down the group due to lanthanoid effect in group.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313234
If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal \({\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\), respectively, then the electronegativity of the element on the Pauling scale is
1 2.8
2 \({\rm{1}}{\rm{.0}}\)
3 \({\rm{4}}{\rm{.0}}\)
4 2.6
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313235
Which pair of elements has maximum electronegativity difference?
1 \(\mathrm{Li}\) and \(\mathrm{F}\)
2 \(\mathrm{Na}\) and \(\mathrm{F}\)
3 \(\mathrm{Na}\) and \(\mathrm{Br}\)
4 \(\mathrm{Na}\) and \(\mathrm{Cl}\)
Explanation:
Electronegativity decreases down the group and increases on moving from left to right in a period. Thus, \(\mathrm{Li}\) is more electronegative than \(\mathrm{Na}\), and \(\mathrm{F}\) is more electronegative than \(\mathrm{Cl}\) and \(\mathrm{Br} . \mathrm{Br}\) is less electronegative than \(\mathrm{Cl}\) because of its larger size. Also, lesser be the electronegativity of metal element and more is the electronegativity of halogen atom, then more will be the electronegativity difference of a given species. Thus, \(\mathrm{Na}\) and \(\mathrm{F}\) shows the maximum electronegativity difference option (2) correct.
AIIMS - 2019
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313242
Assertion : Smaller the size of an atom greater is the electronegativity. Reason : Electronegativity refers to the tendency of atom to share electrons with other 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.
Explanation:
Electronegativity is inversely propotional to size. Electronegativity is a measure of an atom's tendency to attract bonding electrons in a bond. Hence option (3) is correct.
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CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313233
Select the group where electronegativity increases down the group
1 \(\mathrm{Ca}, \mathrm{Sr}\), and Ba
2 \(\mathrm{Zn}, \mathrm{Cd}\), and Hg
3 \(\mathrm{F}, \mathrm{Cl}\), and Br
4 Li, Na, and K
Explanation:
In \(\mathrm{Zn}, \mathrm{Cd}\), and Hg , electronegativity increases down the group due to lanthanoid effect in group.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313234
If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal \({\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\), respectively, then the electronegativity of the element on the Pauling scale is
1 2.8
2 \({\rm{1}}{\rm{.0}}\)
3 \({\rm{4}}{\rm{.0}}\)
4 2.6
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313235
Which pair of elements has maximum electronegativity difference?
1 \(\mathrm{Li}\) and \(\mathrm{F}\)
2 \(\mathrm{Na}\) and \(\mathrm{F}\)
3 \(\mathrm{Na}\) and \(\mathrm{Br}\)
4 \(\mathrm{Na}\) and \(\mathrm{Cl}\)
Explanation:
Electronegativity decreases down the group and increases on moving from left to right in a period. Thus, \(\mathrm{Li}\) is more electronegative than \(\mathrm{Na}\), and \(\mathrm{F}\) is more electronegative than \(\mathrm{Cl}\) and \(\mathrm{Br} . \mathrm{Br}\) is less electronegative than \(\mathrm{Cl}\) because of its larger size. Also, lesser be the electronegativity of metal element and more is the electronegativity of halogen atom, then more will be the electronegativity difference of a given species. Thus, \(\mathrm{Na}\) and \(\mathrm{F}\) shows the maximum electronegativity difference option (2) correct.
AIIMS - 2019
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313242
Assertion : Smaller the size of an atom greater is the electronegativity. Reason : Electronegativity refers to the tendency of atom to share electrons with other 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.
Explanation:
Electronegativity is inversely propotional to size. Electronegativity is a measure of an atom's tendency to attract bonding electrons in a bond. Hence option (3) is correct.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313233
Select the group where electronegativity increases down the group
1 \(\mathrm{Ca}, \mathrm{Sr}\), and Ba
2 \(\mathrm{Zn}, \mathrm{Cd}\), and Hg
3 \(\mathrm{F}, \mathrm{Cl}\), and Br
4 Li, Na, and K
Explanation:
In \(\mathrm{Zn}, \mathrm{Cd}\), and Hg , electronegativity increases down the group due to lanthanoid effect in group.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313234
If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal \({\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\), respectively, then the electronegativity of the element on the Pauling scale is
1 2.8
2 \({\rm{1}}{\rm{.0}}\)
3 \({\rm{4}}{\rm{.0}}\)
4 2.6
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313235
Which pair of elements has maximum electronegativity difference?
1 \(\mathrm{Li}\) and \(\mathrm{F}\)
2 \(\mathrm{Na}\) and \(\mathrm{F}\)
3 \(\mathrm{Na}\) and \(\mathrm{Br}\)
4 \(\mathrm{Na}\) and \(\mathrm{Cl}\)
Explanation:
Electronegativity decreases down the group and increases on moving from left to right in a period. Thus, \(\mathrm{Li}\) is more electronegative than \(\mathrm{Na}\), and \(\mathrm{F}\) is more electronegative than \(\mathrm{Cl}\) and \(\mathrm{Br} . \mathrm{Br}\) is less electronegative than \(\mathrm{Cl}\) because of its larger size. Also, lesser be the electronegativity of metal element and more is the electronegativity of halogen atom, then more will be the electronegativity difference of a given species. Thus, \(\mathrm{Na}\) and \(\mathrm{F}\) shows the maximum electronegativity difference option (2) correct.
AIIMS - 2019
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313242
Assertion : Smaller the size of an atom greater is the electronegativity. Reason : Electronegativity refers to the tendency of atom to share electrons with other 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.
Explanation:
Electronegativity is inversely propotional to size. Electronegativity is a measure of an atom's tendency to attract bonding electrons in a bond. Hence option (3) is correct.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313233
Select the group where electronegativity increases down the group
1 \(\mathrm{Ca}, \mathrm{Sr}\), and Ba
2 \(\mathrm{Zn}, \mathrm{Cd}\), and Hg
3 \(\mathrm{F}, \mathrm{Cl}\), and Br
4 Li, Na, and K
Explanation:
In \(\mathrm{Zn}, \mathrm{Cd}\), and Hg , electronegativity increases down the group due to lanthanoid effect in group.
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313234
If the ionization enthalpy and electron gain enthalpy of an element are 275 and 86 kcal \({\rm{mo}}{{\rm{l}}^{{\rm{ - 1}}}}\), respectively, then the electronegativity of the element on the Pauling scale is
1 2.8
2 \({\rm{1}}{\rm{.0}}\)
3 \({\rm{4}}{\rm{.0}}\)
4 2.6
Explanation:
Conceptual Questions
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313235
Which pair of elements has maximum electronegativity difference?
1 \(\mathrm{Li}\) and \(\mathrm{F}\)
2 \(\mathrm{Na}\) and \(\mathrm{F}\)
3 \(\mathrm{Na}\) and \(\mathrm{Br}\)
4 \(\mathrm{Na}\) and \(\mathrm{Cl}\)
Explanation:
Electronegativity decreases down the group and increases on moving from left to right in a period. Thus, \(\mathrm{Li}\) is more electronegative than \(\mathrm{Na}\), and \(\mathrm{F}\) is more electronegative than \(\mathrm{Cl}\) and \(\mathrm{Br} . \mathrm{Br}\) is less electronegative than \(\mathrm{Cl}\) because of its larger size. Also, lesser be the electronegativity of metal element and more is the electronegativity of halogen atom, then more will be the electronegativity difference of a given species. Thus, \(\mathrm{Na}\) and \(\mathrm{F}\) shows the maximum electronegativity difference option (2) correct.
AIIMS - 2019
CHXI03:CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
313242
Assertion : Smaller the size of an atom greater is the electronegativity. Reason : Electronegativity refers to the tendency of atom to share electrons with other 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.
Explanation:
Electronegativity is inversely propotional to size. Electronegativity is a measure of an atom's tendency to attract bonding electrons in a bond. Hence option (3) is correct.