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प्रश्न
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
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उत्तर
On heating, sugar powder is charred and becomes black while salt does not char. When dissolved in water, the salt solution will conduct electricity because it is ionic while sugar solution will not conduct electricity because it is covalent.
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संबंधित प्रश्न
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
Tick the most appropriate answer.
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- Henri Becquerel
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What does the word ‘atom’ mean?
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Write the full form of IUPAC.
Name the three subatomic particles present in an atom.
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Which of the following statement is correct about the atom of an element ?
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
The smaller particles found in the atom is called ______.
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Define the following term with an example.
Non-metal
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The first scientific theory about atoms was given by J J. Thomson.
