Advertisements
Advertisements
प्रश्न
Why are bells made of metals?
Advertisements
उत्तर
On being hit, metals produce a typical sound. They are said to be sonorous. This property is being made used in making bells.
APPEARS IN
संबंधित प्रश्न
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
Graphite is used in the leads of pencils
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Give reasons for the following:
Most metals conduct electricity well.
With reference to the following metals state their use in daily life metal:
Lead
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
Silver and copper are very good conductors of electricity.
Why are metalloids called semimetals?
