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प्रश्न
Choose the correct alternative.
Diamond is used for
विकल्प
making the electrodes of electric furnaces.
making crucible for melting metals.
cutting and drilling rocks and glass.
making carbon brushes for electric motors.
उत्तर
cutting and drilling rocks and glass.
APPEARS IN
संबंधित प्रश्न
Name the following:
A greyish black non- metal that is a good conductor of electricity.
Answer the following question
Explain the softness of graphite with reference to its structure.
Write ‘true’ or ‘false’ against the following statement:
Wood charcoal is an important constituent of gun powder.
What is destructive distillation? What are the products formed due to the destructive distillation of coal?
FILL IN THE BLANK
.............. is used to make carbon brushes in dynamos.
TRUE \ FALSE
Coal can be converted to coke by destructive distillation.
Explain the following.
Diamond, graphite and fullerenes are crystalline forms of carbon.
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.
Complete the statement by filling the blank with the correct word from the option.
A graphite-clay mixture baked at high temperature is used in making ______.
Write the salient features of Graphene.
