chemistry : class12 Lattice Points : Crystalline solids : Solid State MCQ Questions and Answers
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Lattice Points
MCQ questions and answers.
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MCQ Questions
1. What is a lattice point in a crystalline solid?
A.
A point representing the position of a constituent particle
B.
A vacant space between two particles
C.
The outer surface of a crystal
D.
A bond between two particles
Correct Answer:
A point representing the position of a constituent particle
Explanation:
A lattice point is a definite position in a crystal lattice that represents the location of a constituent particle such as an atom, ion, or molecule.
2. Lattice points in a crystal are arranged in which manner?
A.
Randomly
B.
Regularly and periodically
C.
Only in circular paths
D.
Only at the crystal surface
Correct Answer:
Regularly and periodically
Explanation:
Lattice points are arranged in a regular, repeating pattern throughout a crystalline solid.
3. What does each lattice point represent in a crystal lattice?
A.
A constituent particle or a group of particles
B.
Only an empty space
C.
Only an electron
D.
Only a crystal face
Correct Answer:
A constituent particle or a group of particles
Explanation:
Each lattice point represents the position of a constituent particle or a group of particles having the same environment.
4. Which of the following can be represented by a lattice point?
A.
An atom
B.
Only a photon
C.
Only heat energy
D.
Only a crack in the crystal
Correct Answer:
An atom
Explanation:
A lattice point may represent an atom, ion, or molecule; an atom is one valid example.
5. A crystal lattice is formed by the three-dimensional arrangement of:
A.
Lattice points
B.
Crystal defects only
C.
Random vacancies only
D.
Unrelated molecules
Correct Answer:
Lattice points
Explanation:
A crystal lattice is a regular three-dimensional arrangement of lattice points.
6. What is a basic characteristic of all lattice points in an ideal crystal lattice?
A.
They have a regular repeating arrangement
B.
They are placed without any pattern
C.
They occur only outside the crystal
D.
They represent different crystal shapes
Correct Answer:
They have a regular repeating arrangement
Explanation:
The defining feature of lattice points is their orderly and periodic repetition in the crystal.
7. In an ionic crystal, a lattice point may represent:
A.
A positive ion or a negative ion
B.
Only a neutral atom
C.
Only a free electron
D.
Only a solvent molecule
Correct Answer:
A positive ion or a negative ion
Explanation:
In an ionic crystal, lattice points correspond to the regular positions occupied by cations and anions.
8. Lattice points that are separated by equal distances along a direction indicate:
A.
Periodicity in the crystal
B.
Complete disorder
C.
Absence of constituent particles
D.
A liquid structure
Correct Answer:
Periodicity in the crystal
Explanation:
Repeating separation between lattice points demonstrates the periodic nature of a crystalline lattice.
9. Which statement about lattice points is correct?
A.
They mark the positions of particles in a crystal lattice
B.
They are always empty spaces
C.
They are found only in amorphous solids
D.
They have no regular arrangement
Correct Answer:
They mark the positions of particles in a crystal lattice
Explanation:
Lattice points are used to specify the regular positions occupied by particles in a crystalline solid.
10. The repeated arrangement of lattice points in a crystal gives rise to its:
A.
Long-range order
B.
Random disorder
C.
Temporary shape
D.
Lack of structure
Correct Answer:
Long-range order
Explanation:
The periodic repetition of lattice points throughout a crystal produces long-range order.
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