Question

4) Why is the use of biofertilisers preferred to chemical fetilisers?
5) State any five physical properties on the basis of which metals can be
distinguished from non-metals.
6) Give reason for the following:
a) Diamonds are used for making jewellery
b) Sulphur cannot be used for making pipes.
c) Wires cannot be drawn from wood.​

Answer 1

Answer:

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