Atoms and Molecules — Science STD 9 — Question

Define thallus?

Name the particles used by Rutherford in his experiment on the discovery of nucleus. Also state the charge on these particles.

State whether colloidal solutions are homogeneous or heterogeneous.

Name the three subatomic particles present in an atom.

What conclusion can be obtained from the observation that when the prongs of a sound making tuning fork touch the surface of water in a beaker, the water gets splashed?

What is common or vernacular name?

What differences in the properties of oil and water enable their separation by a separating funnel?

What happens to the pitch of a sound if its frequency increase?

Amongst sponge, mollusc, snail, lizard, which one is the simplest animals and Why?

Arrange the following substances in increasing order of force of attraction between their particles (keeping the substance having them in imum force of attraction first): Water, Sugar, Oxygen