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प्रश्न
Name the following:
A halogen which is a solid at room temperature.
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उत्तर
Iodine
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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:
Copper
State one use of the following metal:
Silver
Which property of ‘solder’ alloy makes it suitable for welding electrical wires?
Brass is an alloy of copper and ______.
The alloy in which one of the metals is mercury is called an ______.
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
What is an alloy?
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Tick (√) the most appropriate answer.
Graphite is used :
Name a metal which is best conductor of electricity :
Why are alkali metals kept in kerosene oil?
Write scientific reason.
Pine oil is used in froth flotation.
With reference to the following metals state their use in daily life metal:
Aluminium
When a copper coin is dipped in the solution of silver nitrate, it shows a lustre on its surface. Explain this process with the help of a chemical equation.
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.
Which metals are liquid at room temperature?
Why are metalloids called semimetals?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the reducing agent.
