Given below are densities of some solids and liquids. Give rough estimates of the size of their atoms :

The Sun is a hot plasma (ionized matter) with its inner core at a temperature exceeding 107 K, and its outer surface at a temperature of about 6000 K. At these high temperatures, no substance remains in a solid or liquid phase. In what range do you expect the mass density of the Sun to be, in the range of densities of solids and liquids or gases ? Check if your guess is correct from the following data : mass of the Sun = 2.0 xx 10^30 kg , radius of the Sun = 7.0 xx 10^8 m .

Given an example each of solid in gas and liquid in gas solution

Give four examples each of solids, liquids and gases.

Given below are examples of some potential energy functions in one dimension. The total energy of the particle is indicated by a cross on the ordinate axis. In each case, specify the regions, if any, in which the particle cannot be found for the given energy.

Given below are measurements of some parts of two triangles. Examine whether the two triangles are congruent or not, by using SAS congruence rule. If the triangles are congruent, write them in symbolic form. (It will be always helpful to draw a rough figure, mark the measuremants and then probe the question).

Given below are measurements of some parts of two triangles . Examine whether the two triangles are congruent or not, by ASA congruence rule. In case of congruence, write it in symbolic form.

The distance of closest approach of an alpha particle gives an estimate of the size of the nucleus. Explain

Choose the correct alternative from the clues given at the end of the each statement: The size of the atom in Thomson model is..... the atomic size in Rutherford model( much greater than /no different from/ much less than.)

Give two examples of colloidal solutions of liquid dispersed in solid. What is the name of the colloidal solution ?