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प्रश्न
Classify the substances given in Fig. 2.2 into elements and compounds
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उत्तर
Elements – Cu, Zn, F2, O2, diamond (C), Hg
Compounds – CaCO3, H2O,
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संबंधित प्रश्न
Define Elements.
Fill in the blank
A diatomic gaseous element is _______.
Indicate whether the following statement is true or false:
Metals reflect light and are good conductors of electricity
Tick (√) the correct alternative from the choice given for the following statement.
Sugar is a compound which consists of the elements
Select the correct answer from the choice given below to complete the sentence :
Dust in air is an example of _________ mixture.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Elements are made up of______ kinds of atoms.
There are ______ number of known elements.
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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.
