10.Solids, liquids and gases
10 . Solid liquid and gases Q. 5.Read the following two statements and choose the correct option. Statement1- liquid have definite volume and shape. Statement 2- The molecules of solid are not very closely packed. Ans. Both statements 1 and 2 are incorrect. Q6. Short answer type questions a . Why is melting of butter a physical change? Ans. Melting of butter is a physical change as no new substance is fromed and there is only change in the state of matter on cooling the melted butter gets solidified. b. How can we change a matter from its one state to another? Ans. We can change a matter from its one state to another by heating and cooling. c. What is a solution? Give an example. Ans. When solutes ( suger or salt) dissolve in solvent like water, the mixture then formed is known as solution for example ,sugar inbwater salt in water etc. d. Define a solute and a solvent. Ans. The liquid in which other substance...