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प्रश्न
Name the following:
The most reactive halogen.
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उत्तर
Fluorine
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संबंधित प्रश्न
Give reasons for the following.
Copper cannot displace zinc from its salt solution.
State one use of the following metal:
Aluminium
State one use of the following metal:
Silver
State one use of the following metal:
Mercury
Brass is an alloy of copper and ______.
Aluminium is not used to make :
State two important uses of the following metal.
Uses of magnesium
Give the general characteristics of:
Alkaline earth metals with reference to
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Write name.
The device used for grinding an ore.
What is it made from? Why?
Electric cables
With reference to the following metals state their use in daily life metal:
Silver
Give a reason why a green deposit is seen on the surface of an article of copper
Name the following:
A metal used in flexible pipes.
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Write the name.
Two highly reactive metals-
Give reasons for the following.
- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
The ability of metals to be drawn into thin wire is known as
Why are bells made of metals?
Which metals are not solid at room temperature?
Why are metalloids called semimetals?
