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प्रश्न
Name the non-metal and its natural form, which is the hardest substance.
उत्तर
Diamond is a form of carbon which is the hardest substance.
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संबंधित प्रश्न
You are given a hammer, a battery, a bulb, wires and a switch.
- How could you use them to distinguish between samples of metals and non-metals?
- Assess the usefulness of these tests in distinguishing between metals and non-metals.
Name two metals which are used for making electric wires.
Name the non-metal which is used in the vulcanisation of rubber.
What is meant by "brittleness"? Which type of elements usually show brittleness: metals or non-metals?
What is the nature of the oxide SO2? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
State one use of Hydrogen.
Name a metal that is the best conductor of electricity
Tick (√) the most appropriate answer.
Sodium amalgam is prepared by dissolving sodium in :
State any five physical properties of a metal.
Physical properties of a metal :
Name:
a non-metal which is ductile
In which of the following industries, microbial enzymes are not used?
a) Glass industry.
b) Cheese industry
c) Tanning industry.
d) Paper industry.
Identify the odd term.
With reference to the physical properties of metals and non-metals, state the following exception.
A non-metal which conducts electricity.
Select the appropriate option for the following statement:
The element placed in the extreme left of the Modern Periodic Table.
_______ is good conductor of heat but bad conductor of electricity.
Brass : Aluminium and zinc : : Bronze : ______
Match the following:
| 1. | Non-metals | a. | Silicon |
| 2. | Metals | b. | fire extinguisher |
| 3. | Metalloids | c. | dull and soft |
| 4. | Oxygen | d. | hard and shiny |
| 5. | Water | e. | supports fire |
Non – metals are ______.
The non – metal which is liquid at room temperature is ______.
