When hot liquid is poured into a thick glass tumbler,it cracks

Glass is good conductor of heat

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Glass is poor conductor of heat

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Solution

The correct option is B Glass is poor conductor of heat
When hot liquid is poured into a thick glass tumbler,it cracks.the reason is that the glass is a poor conductor of heat.when a hot liquid is poured into a tumbler ,the inner surface of the tumbler becomes hot,while the outer surface remain at room temperature.

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