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प्रश्न
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – a gas with a pungent, choking odour which is lighter than air
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उत्तर
A gas with a pungent, choking odour which is lighter than air is Ammonia
संबंधित प्रश्न
Tick the most appropriate answer
Solutions are
- heterogeneous mixtures.
- compounds
- homogeneous mixtures.
- elements
Why is it necessary to separate the constituents of a mixture.
Give two examples of the following.
Non-metals which are lustrous
Give two examples of the following.
Elements which are liquids
Fill in the blank
A metal which is a poor conductor of electricity is _______.
Tick (√) the correct alternative from the choice given for the following statement.
Atoms of different kinds combine to form molecules of
Tick (√) the correct alternative from the choice given for the following statement.
The compound used as common salt is
Complete the statement – an element is a pure substance made up of ____________ atoms.
Complete the statement given below by filling in the blanks with the correct words.
Atom contains ________ , with positively charged _____.
Write the names of elements from the following symbol:
Br
