MEDIUM
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Which of the following has the highest electron affinity?
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Important Questions on Classification of Elements and Periodicity in Properties
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For electron gain enthalpies of the elements denoted as , the incorrect option is :
EASY
The formation of the oxide ion, , from oxygen atom requires first an exothermic and then an endothermic step as shown in below:
Thus process of formation of in gas phase is unfavourable though is isoelectronic with neon. It is due to the fact that,
HARD
In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical?
(A) and
(B) and
(C) and
(D) and
Choose the correct answer from the options given below:
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The difference between electron gain enthalpies will be maximum between :
EASY
Which of the following elements has the most negative electron gain enthalpy?
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The correct order of first electron affinity of and is
EASY
What is the correct oder of electron gain enthalpy of
EASY
The absolute value of the electron gain enthalpy of halogens satisfies:
EASY
The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na + will be :
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The first electron affinity of and will be of the order
EASY
Within each pair of elements and , and , and and , respectively, the elements that release more energy upon an electron gain are
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Which of the following reactions does not involve absorption of energy?
I.
II.
III.
IV.
EASY
When the first electron gain enthalpy of oxygen is , its second electron gain enthalpy is:
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N0/4 atoms of X(g) are converted into X+(g) by energy E1. N0 /4 atoms of X(g) are converted into X–(g) by energy E2. Hence, ionisation potential and electron affinity of X(g) are :
MEDIUM
Which of the following have the highest electron affinity?
EASY
The correct order of electron affinity of B, C, N and O is
EASY
The equation used to represent the electron gain enthalpy is
MEDIUM
The element with which of the following electronic configuration, will have the highest electron affinity?
MEDIUM
Which element has maximum electron affinity?
HARD
In which of the following species, energy is released when electron is added ?
