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प्रश्न
Select the appropriate option for the following statement:
The element from the halogen family which is most abundant
पर्याय
Boron
Chlorine
Potassium
Platinum
Radon
उत्तर
Chlorine.
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संबंधित प्रश्न
Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties
| Properties | Metals | Non-metals |
| 1. Appearance | Lustrous | Dull |
| 2. Hardness | Hard | Soft |
| 3. Malleability | Can be beaten into thin sheets | Cannot be beaten into thin sheets |
| 4. Ductility | Can be drawn into wires | Cannot be drawn into wires |
| 5. Heat Conduction | Good conductors of heat | Poor conductors of heat |
| 6. Conduction of Electricity | Good conductors of electricity | Poor conductors of electricity |
Give reasons for the following.
Aluminium foils are used to wrap food items.
Why is ammonia gas not collected over water?
Name the metal which is the poorest conductor of heat.
What is meant by "brittleness"? Which type of elements usually show brittleness: metals or non-metals?
Name two non-metals which are both brittle and non-ductile.
State any five physical properties of metals.
Give four differences between metals and non-metals with reference to their:
- Melting point and boiling point
- The conductivity of heat and electricity
- Malleability
- Solubility
Statements given below are incorrect. Write the correct statements :
Chlorine gas is used in the manufacture of sulphuric acid.
Name the non-metal and its natural form, which is the hardest substance.
Name:
two non metals which are monoatomic
Give the balanced reactions for the following:
Sodium is dropped in water
Explain the term Minerals.
In which of the following industries, microbial enzymes are not used?
a) Glass industry.
b) Cheese industry
c) Tanning industry.
d) Paper industry.
What are the metals that make the alloys brass and bronze?
Name the following:
or
With reference to the physical properties of metals and non-metals, state the following exception.
A metal which is liquid at room temperature.
State whether the statement given below is true or false. If false write the correct statement.
Lead pencils contain lead.
The non-metal which conducts electric current is
Tabulate the differences between metals and non-metals.
