The Amazing World of Solutes, Solvents, and Solutions — Science STD 8 — Question

Give one use of teflon.

Name the machine used in recovering the grain from already cut crop.

Explain why the following are made of thermosetting plastics. Electric plugs/ switches/ plug boards.

How much is the volume difference indicated between the two bigger marks (for example, between 10 mL and 20 mL)?

Name any two water pollutants which are toxic for both plants and animals.

Suggest a suitable word for the following statements. Chemicals which kill or stop the growth of pathogens.

A rocket has been fired upwards to launch a satellite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad (Ignore the frictional force due to air resistance).

An electric current is passed through a conducting solution. List any three possible observations.

Cotton and jute are animal fibres. Is it correct?

Name the instrument (or device) which is needed to see the micro-organisms.