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प्रश्न
Name A substance used as an insulator.
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उत्तर
Plastic is used as insulator as it is bad conductor of electricity
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संबंधित प्रश्न
Tick the most appropriate answer.
The constituents of a mixture are present in
- a fixed ratio
- a variable ratio,
- the ratio of 2: 1
- none of these
Name: an Inert Gas
Define:
Atomicity
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
Classify the substances given in Fig. 2.2 into elements and compounds
Higher-Order Thinking questions:
Why is hydrogen considered an element?
Name the element which is used in toothpaste to strengthen our teeth.
