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प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
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उत्तर
Sodium and potassium are stored in kerosene because they are highly reactive elements. They can easily catch fire even when in contact with air.
संबंधित प्रश्न
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Generally, non-metals react with acids. ( )
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
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.
Give reasons
Aluminium is used in making aircrafts.
Tick (√) the most appropriate answer.
Graphite is used :
State two important uses of following metal
Uses of tin
Write name.
The nonmetal having electrical conductivity.
When a copper coin is dipped in silver nitrate solution, a glitter appears on the coin after some time. Why does this happen? Write the chemical equation.
State a specific reason for using copper in electrical cables
In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.
- ______ is a metal.
- Metals are good ______ of electricity.
