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Metal is used in dry cells.Galvanisation prevents_The ores usually have some impurities called_mixed. Non-metals form_oxides by reacting with oxygen.Vulcanisation involves the treatment of rubber with_Magnesium burns with a dazzling_ light on heating. ​

Answer» <html><body><p><strong>Answer:</strong></p><p>The nonmetal <a href="https://interviewquestions.tuteehub.com/tag/used-2318798" style="font-weight:bold;" target="_blank" title="Click to know more about USED">USED</a> to treat rubber in the process of vulcanization is sulphur. Natural rubber is <a href="https://interviewquestions.tuteehub.com/tag/soft-631843" style="font-weight:bold;" target="_blank" title="Click to know more about SOFT">SOFT</a>, sticky and has less tensile strength. Vulcanization makes rubber more strong, tough and elastic. Natural rubber is mixed with 3 to 5 % sulphur and heated at 100 to 150 deg C, which <a href="https://interviewquestions.tuteehub.com/tag/results-2643" style="font-weight:bold;" target="_blank" title="Click to know more about RESULTS">RESULTS</a> in cross linking of chains of cis-1,4-polyisoprene through <a href="https://interviewquestions.tuteehub.com/tag/disulphide-2059775" style="font-weight:bold;" target="_blank" title="Click to know more about DISULPHIDE">DISULPHIDE</a> (−S−S−) bonds.</p></body></html>


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