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प्रश्न
Mention two uses of the following metals and non-metals
Oxygen
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उत्तर
It is used by all living beings for breathing.
It is important for combustion.
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संबंधित प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
State one use of the following metal:
Aluminium
State one use of the following metal:
Mercury
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.
How are the properties of an alloy different from those of the constituent elements?
Give reasons
Magnesium is used in fire works.
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
A solution of a metal in mercury is called ________
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Name a metal which is not malleable :
State two important uses of following metal
Uses of mercury
State a specific reason for using copper in electrical cables
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Why are bells made of metals?
The most abundant element in the universe is ____________.
A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.
All gases are ______.
Which metals are not solid at room temperature?
Compare the conductivity of metals and non–metals.
