Physics Past Paper PDF - Chapter 1.4.1 Effect of Change of Temperature

Q 1.4.1 EFFECT OF CHANGE OF TEMPERATURE uestions 1. The mass per unit volume of a substance is called density. (density = mass/volume). Arrange the following in order of increasing density – air, exhaust from chimneys, honey, water, chalk, cotton and iron. 2. (a) Tabulate the differences in the char...

Q 1.4.1 EFFECT OF CHANGE OF TEMPERATURE uestions 1. The mass per unit volume of a substance is called density. (density = mass/volume). Arrange the following in order of increasing density – air, exhaust from chimneys, honey, water, chalk, cotton and iron. 2. (a) Tabulate the differences in the characterisitcs of states of matter. (b) Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density. 3. Give reasons (a) A gas fills completely the vessel in which it is kept. (b) A gas exerts pressure on the walls of the container. (c) A wooden table should be called a solid. (d) We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert. 4. Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why. Activity _____________ 1.12 Take about 150 g of ice in a beaker and suspend a laboratory thermometer so that its bulb is in contact with the ice, as in Fig. 1.6. (a) 1.4 Can Matter Change its State? We all know from our observation that water can exist in three states of matter– solid, as ice, liquid, as the familiar water, and gas, as water vapour. What happens inside the matter during this change of state? What happens to the particles of matter during the change of states? How does this change of state take place? We need answers to these questions, isn’t it? (b) Fig. 1.6: (a) Conversion of ice to water, (b) conversion of water to water vapour 6 SCIENCE Rationalised 2023-24