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


7.
According to Fajan's rules, the covalent character of an ionic bond is greatest when:
A.
The charge on the cation is small
B.
The cation is small and the anion is large
C.
Both cation and anion are large
D.
The cation is large and the anion is small
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ANSWER :
B. The cation is small and the anion is large
8.
Which of the following ionic compounds is expected to have the highest lattice enthalpy?
A.
KBr
B.
CsI
C.
MgO
D.
NaCl
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ANSWER :
C. MgO
9.
The electrovalence of an element is equal to:
A.
The number of valence electrons
B.
The atomic number of the element
C.
The number of shells in the atom
D.
The number of unit charges on the ion formed
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ANSWER :
D. The number of unit charges on the ion formed
10.
Which of the following is NOT a characteristic of ionic compounds?
A.
They have high melting and boiling points
B.
They form three-dimensional crystal lattices
C.
They are stabilized by coulombic interaction energy
D.
They consist of discrete molecules
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ANSWER :
D. They consist of discrete molecules
11.
Among the following, which cation has the maximum polarizing power?
A.
Na⁺
B.
Al³⁺
C.
Mg²⁺
D.
K⁺
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ANSWER :
B. Al³⁺
12.
Which of the following statements correctly describes the relation between ionization enthalpy, electron gain enthalpy, and lattice enthalpy in ionic compound formation?
A.
Ionic compound formation is endothermic overall
B.
Ionization enthalpy is always exothermic
C.
Lattice enthalpy compensates for the net positive energy of ionization and electron gain
D.
Electron gain enthalpy is always exothermic
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ANSWER :
C. Lattice enthalpy compensates for the net positive energy of ionization and electron gain