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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
Give two examples for the following: Metals
Name a soft metal.
Give one example for the following types of mixtures :
misicible liquids
Define a pure substance. How many types of pure substances do you know?
Give reason: Graphite is used to make a lead of the pencils.
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
Give the name of the radical - CO3
Complete the statement with the correct words.
_______ are chemicals which are hydroxide (or oxides) of ______ eg. sodium hydroxide.
Complete the statement with the correct words.
__________ are chemicals formed on reaction of a base with an _____ giving salt and water.
Select the correct answer from the choice given below.
The unreactive non-metallic element
