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Question
An unknown material is found to be bad conductor of heat and electricity, non-sonorous and non-malleable. It cannot be:
An unknown material is found to be bad conductor of heat and electricity, non-sonorous and non-malleable. It cannot be:
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Solution
The correct option is D Silver
Sulphur, iodine and carbon are non-metals, whereas silver is a metal. Non-metals are generally non-sonorous, non-ductile and poor conductors of heat and electricity, whereas metals are sonorous (produce ringing sounds on hitting), ductile (can be drawn into thin wires) and good conductors of heat and electricity. Since, the unknown material shows the properties of non-metals, so it cannot be silver, which is a metal.
Sulphur, iodine and carbon are non-metals, whereas silver is a metal. Non-metals are generally non-sonorous, non-ductile and poor conductors of heat and electricity, whereas metals are sonorous (produce ringing sounds on hitting), ductile (can be drawn into thin wires) and good conductors of heat and electricity. Since, the unknown material shows the properties of non-metals, so it cannot be silver, which is a metal.
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