A solid which is not transperent to visible light and whose conductivily increase with temperature is formed by
A
Ionic bonding
B
Covatent bonding
C
vander Waals bonding
D
Metallic bonding
Text Solution
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The correct Answer is:
B
Van der waal's bonding is attributed to the attractive forces between molecules of a liquid . The conductivity of semiconductors (covalent bonding) and insulators (ionic bonding) increases with increases in temperature while that of metals (metallie bonding) decreases
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