Question

fast..........................

Answer 1

1) They are tightly arranged
2) By passing light through pure water, if it does not show tyndall effect,then it is a pure water
3) when gallium is kept in our palm,it melts because it is only metal which changes to liquid when kept in our palm
4) The solutions which completely mixed with sugar or salt until they are not mixing properly 5)don't know,sorry

Answer 2

Hey mate....

here's the answer.....

1) Solids have definite shape n volume because their molecules have no spaces and are tightly arranged.

2) Pure water does not show Tyndall effect.

3) Gallium melts in our palm because it is the metal which melts when kept on palm.

4) Saturated solution is that solution which has more concentration of solute then solvent.
We can mix salt in water.

5) It happens because the kinetic energy increases with temperature and hence solid changes solubility.

Hope this helps❤