Physical Chemistry - Solid State

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Q1. Which of the following solids has a high thermal conductivity? (2019)

Solution:

Metallic solids have high thermal conductivity due to the presence of free-moving electrons.

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Q2. Which of the following has the highest density? (2019)

Solution:

Copper has a higher density compared to the other listed materials due to its closely packed atomic structure.

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Q3. What is the coordination number of atoms in a face-centered cubic (FCC) structure? (2021)

Solution:

In a face-centered cubic (FCC) structure, each atom is in contact with 12 other atoms, giving it a coordination number of 12.

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Q4. What is the packing efficiency of a body-centered cubic (BCC) structure? (2020)

Solution:

The packing efficiency of a body-centered cubic (BCC) structure is approximately 68%.

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Q5. In which type of solid are the constituent particles held together by covalent bonds? (2022)

Solution:

Covalent network solids are held together by a network of covalent bonds, resulting in very high melting points.

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Q6. What is the coordination number of atoms in a face-centered cubic (FCC) lattice? (2021)

Solution:

In a face-centered cubic (FCC) lattice, each atom is surrounded by 6 other atoms, giving it a coordination number of 6.

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Q7. What type of crystal system does a diamond belong to? (2023)

Solution:

Diamond crystallizes in a cubic crystal system, specifically in a face-centered cubic lattice.

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Q8. What is the unit cell of diamond? (2022)

Solution:

Diamond has a face-centered cubic (FCC) structure with a complex arrangement of carbon atoms.

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Q9. Which of the following solids has a high degree of anisotropy? (2019)

Solution:

Covalent solids exhibit a high degree of anisotropy due to their directional bonding.

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Q10. What is the main characteristic of amorphous solids? (2023)

Solution:

Amorphous solids lack long-range order, which distinguishes them from crystalline solids.