Is Matter Aroun...

Tyndall effect observed as a result of scattering of light by particles is observed in

The size of particles in suspension, true the solution and colloidal solution varies in order.

Which is a colloid?

Which of the following are compounds? 
$$(i)$$ $$CO $$
$$(ii)$$ $$Na $$
$$(iii)$$ $$NO $$
$$(iv)$$ $$Co$$

Which of the following statement are true for pure substances?
(i) Pure substances contain only one kind of particles.
(ii) Pure substances may be compounds or mixtures.
(iii) Pure substances have the same composition throughout.
(iv) Pure Substances can be exemplified by all elements other than nickel.

When a mixture of iron powder and sulphur powder is heated strongly to form iron sulphide then heat energy is :

Which of the following materials fall in the category of a "pure substance"?

Which of the following procedures will give you water free from all impurities?

Which of these is used for the separation of two miscible liquids that have sufficient difference in their boiling points?

Components of crude petroleum can be separated by :