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प्रश्न
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
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उत्तर
(i) Chlorine – greenish-yellow
(ii) Nitrogen dioxide – reddish brown.
संबंधित प्रश्न
Give two examples for the following: Metals
Write true or false
All pure substances have characteristic melting and boiling points.
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
Fill in the blank
A diatomic gaseous element is _______.
Indicate whether the following statement is true or false:
Elements are made up of compounds
Write the names of elements from the following symbol:
Fe
Select the correct answer to the statement given below:
A metalloid
Explain the term ‘mixture’.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
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 |
