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प्रश्न
State the reasons for use of graphite
(i) as a lubricant for heated machine parts,
(ii) as a lining for crucibles used in manufacture of high grade steel,
(iii) as an electrode in electroplating.
उत्तर
- Heavy machines which run very fast, when other lubricants are used catch fire, but graphite as lubricant when used parallel layers slide over one and other is non-volatile and non-sticky and reduces friction between rotating parts.
- Graphite is used in refractory crucibles as graphite can withstand high temperature is a good conductor of heat.
- Graphite as electrode in electroplating as graphite is good conductor of electricity relatively inert and almost does not react with acids.
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संबंधित प्रश्न
Choose the correct alternative.
Graphite is not found in
Write true or false
Graphite has layers of hexagonal carbon bondings.
Give two uses of graphite.
Fill in the blank
Coal is a ............. form of carbon.
Write ‘True’ Or ‘False’ Against the Following Statement:
Charcoal is a good adsorbent.
Write ‘true’ or ‘false’ against the following statement:
Coal gas is used in the preparation of artificial ferilizers.
Give two uses for the following:
bone charcoal
Explain the difference.
Crystalline and non-crystalline forms of carbon.
Name the following:
An allotrope of carbon used for the manufacture of coke.
Name the following:
An amorphous allotrope of carbon which floats on water.
