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प्रश्न
Complete the statement – an element is a pure substance made up of ____________ atoms.
पर्याय
identical
different
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उत्तर
An element is a pure substance made up of identical atoms.
संबंधित प्रश्न
Name: a Liquid Metal
State the number of atoms of C6H12O6
State the number of atoms of H2SO4
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Select the correct answer from the choice given below.
The negatively charged particles in an atom
Select the correct answer to the statement given below:
A metalloid
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Match the following.
| 1. | Element | Made up of molecules |
| 2. | Compound | Impure substance |
| 3. | Colloid | Settles down on standing |
| 4. | Suspension | Pure substance |
| 5. | Mixture | Made up of atoms |
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.
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.
