Ionic Bonding (Formation of Ionic Bonds, Factors Affecting the Formation of Ionic Bonds; Calculation of Lattice Enthalpy ) NEET Questions

Physical Chemistry - Chemical Bonding and Molecular Structure

Ionic Bonding (Formation of Ionic Bonds, Factors Affecting the Formation of Ionic Bonds; Calculation of Lattice Enthalpy ) MCQ Questions


13.
The strength of an ionic bond depends on:
A.
Only the sizes of the ions
B.
Both charges and sizes of the ions
C.
Only the charges on the ions
D.
The number of valence electrons in the cation only
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ANSWER :
B. Both charges and sizes of the ions
14.
Why does NH₄⁺ form ionic compounds even though it consists entirely of non-metallic elements?
A.
Because nitrogen acts as a metal in NH₄⁺
B.
Because hydrogen behaves as an alkali metal in NH₄⁺
C.
Because the NH₄⁺ ion has an overall positive charge that allows it to form ionic bonds with anions
D.
Because NH₄⁺ is electroneutral
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ANSWER :
C. Because the NH₄⁺ ion has an overall positive charge that allows it to form ionic bonds with anions
15.
The formation of a positive ion from a neutral atom is associated with:
A.
No change in energy
B.
Release of energy equal to ionization enthalpy
C.
Release of energy equal to electron gain enthalpy
D.
Absorption of energy equal to ionization enthalpy
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ANSWER :
D. Absorption of energy equal to ionization enthalpy
16.
If the ionization enthalpy of element X is 500 kJ/mol and the electron gain enthalpy of element Y is -350 kJ/mol, what minimum lattice enthalpy is needed for the formation of stable XY ionic compound?
A.
Equal to 350 kJ/mol
B.
Less than 150 kJ/mol
C.
Greater than 150 kJ/mol
D.
Greater than 850 kJ/mol
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ANSWER :
C. Greater than 150 kJ/mol
17.
Which of the following arrangements correctly represents the order of lattice enthalpy?
A.
NaCl > NaF > NaI > NaBr
B.
NaI > NaBr > NaCl > NaF
C.
NaBr > NaI > NaF > NaCl
D.
NaF > NaCl > NaBr > NaI
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ANSWER :
D. NaF > NaCl > NaBr > NaI
18.
The electron gain enthalpy of chlorine is -348.7 kJ/mol. This means:
A.
348.7 kJ of energy is released when an electron is added to Cl(g)
B.
348.7 kJ of energy is required to remove an electron from Cl⁻(g)
C.
348.7 kJ of energy is required to add an electron to Cl(g)
D.
Both B and C are correct
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ANSWER :
D. Both B and C are correct