Solid State

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Solid State - 04

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Q1. The empty space between the shaded balls and hollow balls as shown in the diagram is called *

1 point

Double triangular void

Hexagonal void

Tetrahedral void

Octahedral void

Q2. For a solid with the following structure, the coordination number of the point B is *

1 point

Q3. If ‘a’ is the length of unit cell, then which one is correct relationship? *

1 point

For simple cubic lattice, Radius of metal atom = a/2

All are correct

For fcc lattice, Radius of metal atom = a/2√2

For bcc lattice, Radius of metal atom = √3a/4

Q4. Ice crystallises in a hexagonal lattice having the volume of unit cell as 132 × 10^–24 cm3. If density is 0.92 gcm–3 at a given temperature, then number of H2O molecules per unit cell is *

1 point

Q5. Lithium metal has a body centred cubic structure. Its density is 0.53 g cm–3 and its molar mass is 6.94 gmol–1. Calculate the edge length of a unit cell of Lithium metal *

1 point

102.8 pm

257.91 pm

8.62 pm

351.6 pm

Q6. What is the volume of a face centred cubic unit cell, when its density is 2.0 g cm–3 and the molar mass ofthe substance is 60.23 g mol–1? *

1 point

4 × 10^–22 cm3

2 × 10^–22 cm3

44 × 10^–22 cm3

22 × 10^–22 cm3

Q7. The C–C and Si–C interatomic distances are 154 pm and 188 pm. The atomic radius of Si is *

1 point

111

114

Q8. Pyroelectric crystals produce feeble electric current *

1 point

On sublimation

On heating

On dissolving in a solvent

On deformation

Q9. Zinc oxide on heating changes to yellow. This is because *

1 point

Zinc oxide is a stoichiometric compound

It shows metal deficiency defect

Zinc oxide is a covalent compound

Zinc oxide shows metal excessive defect

Q10. F-centres in an ionic crystals are *

1 point

Lattice sites containing electrons

Lattice sites that are vacant

Interstitial sites containing electrons

Interstitial sites containing cations

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