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The range of temperature in which vulcanized rubber can be used is

$\begin{array}{1 1}(a)\;40^{\large\circ}C\;to\;100^{\large\circ}C\\(b)\;100^{\large\circ}C\;to\;120^{\large\circ}C\\(c)\;-40^{\large\circ}C\;to\;100^{\large\circ}C\\(d)\;10^{\large\circ}C\;to\;60^{\large\circ}C\end{array}$

Can you answer this question?

Natural rubber can be used over a narrow range of temperature (from $10^{\large\circ}C\;to\;60^{\large\circ}C$).Due to the sulphur cross linkages in vulcanized rubber,it can be used over a wide range of temperature $(-40^{\large\circ}C\;to\;100^{\large\circ}C$)
Hence (c) is the correct answer.
answered Mar 13, 2014