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Which of the following crystalline solid...

Which of the following crystalline solids conduct electricity in molten state but not in solid state?

A

in molten state free ions are furnished which are not free to move in solid state

B

in solid state ionic solids are hard, brittle and become soft in molten state

C

all solids conduct electricity in molten state

D

in solid state ions are converted to atoms which are insulators

Text Solution

Verified by Experts

The correct Answer is:
A
Ionic solids conduct electricity in molten state since in molten state ionic solids dissociate to give free ions which in solid state are not free to move and are held together by strong electrostatic forces of attraction.
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  • Crystalline solids have

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
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    D
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    D
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