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प्रश्न
Give reasons
Graphite is used in the leads of pencils
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उत्तर
Graphite turns paper black that is why it is used in the leads of pencils.
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संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
Give the composition of an alloy called solder. State its one property and one use.
What is an alloy?
Give reasons
Magnesium is used in fire works.
Give reasons
Aluminium is used in making aircrafts.
Give two uses of Germanium
Aluminium is not used to make :
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
______ is a liquid metal.
Statements given below are incorrect. Write the correct statements :
Bronze is a mixture of 10% copper, 80% zinc and 10% tin.
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
State two important uses of following metal:
Uses of aluminium
Why are alkali metals kept in kerosene oil?
Write name.
The device used for grinding an ore.
State the position of the following in the periodic table:
Halogens
Compare the properties of metals and nonmetals. Give three examples for each.
Which of the following property is generally not shown by metals?
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
Why are bells made of metals?
Metals are ______ conductors of heat and electricity.
Why do metals appear shiny?
