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प्रश्न
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
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उत्तर
Sulphur, phosphorus
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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
How is sodium chloride different from its constituent elements, sodium and chlorine in its properties? Justify.
Select the correct answer from the choice given below.
An element which is a poor conductor of heat
Select the correct answer from A, B, C, D & E for the statement given below :
A non-metal that is lustrous.
Select the correct answer from the choice given below to complete the sentence :
Dust in air is an example of _________ mixture.
Non-metal conducting electricity :______ :: Metal conducting electricity : Copper
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?
Give the chemical formula for cane sugar.
Name the element which is used in toothpaste to strengthen our teeth.
