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Solid State Physics

7. 

find the correct one

A. Conversion from the solid state to liquid state-freezing B. conversion from the solid state to Liquid state-fusion C. convertion from the Solid state to gaseous state- sublimation D. conversion from the liquid state to solid state-vaporisation

Answer : C. convertion from the Solid state to gaseous state- sublimation

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8. 

Dry ice is

A. solid carbon B. solid nitrogen C. solid ammonia D. solid methane

Answer : A. solid carbon

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9. 

When electrons are trapped in the crystal lattice in place of anion vacancy, the defect in the crystal is known as

A. Non-stochiometric defect. B. F-centre C. stochiometric defect D. Frenkel defect

Answer : B. F-centre

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10. 

Which one of the following properties of a liquid does not affect its rate of evaporation?

A. Volume B. surface area C. temperature D. boiling point

Answer : A. Volume

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11. 

A corked bottle full of water when frozen will break because

A. the bottle contracts on freezing B. the volume of water decreases on freezing C. the volume of water increases on freezing D. glass is a bad conductor of heat

Answer : C. the volume of water increases on freezing

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12. 

Mercury boils at

A. 100o C B. 357oC C. 247o C D. 189o C

Answer : B. 357o C

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