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प्रश्न
Electrical wires have a coating of an insulting material. The material, generally used is
पर्याय
Sulphur
Graphite
PVC
All can be used
उत्तर
PVC
Explanation -
Polyvinyl chloride is a synthetic plastic polymer which is a bad conductor of electricity and thus used as an insulating coating material for metallic wires.
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संबंधित प्रश्न
Name one metal which is extracted by reduction with heat alone.
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what is ignition mixture?
Name : The metal which is liquid at room temperature.
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
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Write the molecular formulae of the following compound.
Fluorspar
In thermite welding a mixture of ____________ is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
