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प्रश्न
Give reason: Graphite is used to make a lead of the pencils.
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उत्तर
Graphite leaves mark on the paper and makes it black.
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संबंधित प्रश्न
What is the difference between a pure substance and a mixture ?
Define a pure substance. How many types of pure substances do you know?
Give two examples of the following.
Inert gases
Define:
Atomicity
Name: Three different forms of carbon
Answer the following question:
Why are copper and aluminium used to make electric wires?
Fill in the blank
A metal which is a poor conductor of electricity is _______.
Indicate whether the following statement is true or false:
Molecules combine to form atoms
Water contains _____ and _____ element.
Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
