Question

Bromine has a melting point of $ - 7.2^\circ C $ and a boiling point of $ 59^\circ C $ . At what temperature will bromine have a definite volume but no definite shape?
(A). $ 65^\circ C $
(B). $ 36^\circ C $
(C). $ - 26^\circ C $
(D). $ 98K $

Answer 1

Hint: We have three fundamental states of matter, (i) Solids having definite mass, definite shape, and definite volume. (ii) Liquids having definite mass, definite shape but varied volume. And (iii) Gaseous state with definite mass, varied shape, and varied volume. The melting and boiling points of all the states are different.

Complete answer:
From our three fundamental states of matter, we can say that liquids do have a definite volume but no definite shape. Thus the given Bromine is in a liquid state. Now for the liquid state to be achieved by the bromine, the necessary temperature condition is between the range of $ - 7.2^\circ C $ to $ 59^\circ C $ . Thus the correct option is that option that has a temperature in the given range which is an option (b). The correct answer is (B). $ 36^\circ C $ .
The three terms mass, volume, and shape are defined as; Mass: - that property of matter which reflects the quantity of any matter within the observed sample. The measuring units of mass as grams and kilograms. Volume: - it is the related quantity of any substance present at the given temperature and given pressure. Shape: - is the orientation of all the atoms present in the molecules.

Note:
Boiling point is defined as the temperature at which the sum of the pressure exerted by the liquid is equal to the sum of the pressure exerted by the surroundings on it, For water, this temperature is $ 100^\circ C $ . Whereas melting point is defined as the temperature at which the state of solid starts converting to liquid, For solid water (ice) the melting point is $ 0^\circ C $ .