Electron Gain Enthalpy NEET Questions

Inorganic Chemistry - Classification of Elements and Periodicity in Properties

Electron Gain Enthalpy MCQ Questions


1.
Electron gain enthalpy (ΔegH) is defined as:
A.
The energy required to break a chemical bond
B.
The energy released when a covalent bond is formed
C.
The enthalpy change when an electron is added to an isolated gaseous atom in its ground state to form a gaseous anion
D.
The energy required to remove an electron from an atom
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ANSWER :
C. The enthalpy change when an electron is added to an isolated gaseous atom in its ground state to form a gaseous anion
2.
The process represented by electron gain enthalpy is:
A.
X(s) + e⁻ → X⁻(s)
B.
X(g) → X⁺(g) + e⁻
C.
X(g) + e⁻ → X⁻(g)
D.
X₂(g) + 2e⁻ → 2X⁻(g)
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ANSWER :
C. X(g) + e⁻ → X⁻(g)
3.
The unit of electron gain enthalpy is:
A.
J K⁻¹
B.
kJ
C.
kJ mol⁻¹
D.
kJ K⁻¹ mol⁻¹
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ANSWER :
C. kJ mol⁻¹
4.
If energy is released when an electron is added to an atom, then the electron gain enthalpy is:
A.
Infinity
B.
Negative
C.
Zero
D.
Positive
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ANSWER :
B. Negative
5.
If energy must be supplied to add an electron to an atom, then the electron gain enthalpy is:
A.
Negative
B.
Always negative
C.
Zero
D.
Positive
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ANSWER :
D. Positive
6.
A more negative electron gain enthalpy means:
A.
The atom absorbs more energy on accepting an electron
B.
The atom has a smaller size
C.
The atom releases more energy on accepting an electron (greater tendency to gain electrons)
D.
The atom is less reactive
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ANSWER :
C. The atom releases more energy on accepting an electron (greater tendency to gain electrons)