Ionization Enthalpy NEET Questions

Inorganic Chemistry - Classification of Elements and Periodicity in Properties

Ionization Enthalpy MCQ Questions


1.
Which element has the highest first ionization enthalpy?
A.
Helium
B.
Hydrogen
C.
Neon
D.
Fluorine
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ANSWER :
A. Helium
2.
The first ionization enthalpy generally:
A.
Increases across a period
B.
Increases down a group
C.
Decreases across a period
D.
Remains constant across a period
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ANSWER :
A. Increases across a period
3.
Which of the following has the lowest first ionization enthalpy?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
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ANSWER :
D. Rubidium
4.
The first ionization enthalpy of nitrogen is higher than that of oxygen due to:
A.
Higher atomic number
B.
Half-filled p-orbital in nitrogen
C.
Smaller atomic size of oxygen
D.
Higher electronegativity of oxygen
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ANSWER :
B. Half-filled p-orbital in nitrogen
5.
Which factor affects ionization enthalpy?
A.
Nuclear charge
B.
Atomic size
C.
Shielding effect
D.
All of the above
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ANSWER :
D. All of the above
6.
In the alkali metals, the ionization enthalpy:
A.
Increases down the group
B.
Decreases down the group
C.
Remains the same down the group
D.
First increases then decreases
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ANSWER :
B. Decreases down the group