Question

Q. 1. Fill in the blanks :-

1. A process of separation of grains from chaff is know as
2. Certain plants of the same kind grown on a large scale is know as
3. Blue green algae fix
..............directly from air and enhance the fertility of soil.
4. Synthetic fibres are synthesised from raw materials called..
5. Synthetic fibres are also caited as....................or..
........fibres.
6.
..........
.is prepared by using wood pulp.
7. Phosphorus is a very.....
......non-metal.
8. Metals are...................
.conductor of heat and..............
9. Friction produce...
........ It depend on the................of surfaces.
... friction .
10. Sprinkling of powder on the carrom board...........
sas.​

Answer 1

Answer:

1. Winnowing
2. The same kind of plants grown and cultivated in a large scale is called as Crops.
3. Nitrogen
4. Petrochemical
5. Man - made or artificial fibres
6. Rayon is a man -made fibre prepared from natural raw - material called cellulose by chemical treatment. The Cellulose required for making rayon obtained from Wood pulp.
7. Reactive Non - metal
8. good , electricity
9. smoothness of the surface
10. To make the surface Smooth.

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