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A compound forms hcp structure. Number of octahedral and tetrahedral voids in 0.5 mole of substance is respectively

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Important Questions on Solid State

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12th Maharashtra Board
IMPORTANT
Chemistry Standard 12>Chapter 1 - Solid State>Exercises>Q 1
Pb has fcc structure with edge length of unit cell 495 pm. Radius of Pb atom is
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12th Maharashtra Board
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Chemistry Standard 12>Chapter 1 - Solid State>Exercises>Q 2
What are the types of particles in each of the four main classes of crystalline solids?
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12th Maharashtra Board
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Chemistry Standard 12>Chapter 1 - Solid State>Exercises>Q 2
Which of the three types of packing used by metals makes the most efficient use of space and which makes the least efficient use?
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12th Maharashtra Board
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Chemistry Standard 12>Chapter 1 - Solid State>Exercises>Q 2

The following pictures show population of bands for materials having different electrical properties. Classify them as insulator, semiconductor or a metal.

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12th Maharashtra Board
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Chemistry Standard 12>Chapter 1 - Solid State>Exercises>Q 2
What is the unit cell?
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12th Maharashtra Board
IMPORTANT
Chemistry Standard 12>Chapter 1 - Solid State>Exercises>Q 2
How does electrical conductivity of a semiconductor change with temperature? Why?
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12th Maharashtra Board
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Chemistry Standard 12>Chapter 1 - Solid State>Exercises>Q 2

The picture represents bands of MOs for Si. Label valence band, conduction band and band gap.

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12th Maharashtra Board
IMPORTANT
Chemistry Standard 12>Chapter 1 - Solid State>Exercises>Q 2
A solid is hard, brittle and electrically nonconductor. Its melt conducts electricity. What type of solid is it?