Page 1 - HOME ASSIGNMENT-2(PRACTICE WS)
P. 1

SAI International School
                                                  Subject-Chemistry

                                          Ch-Matter in our surroundings
                Topic- Nature & Characteristics of particles of matter, States of matter
                                      & Interconversion of States of Matter

                                                      Worksheet-1
               MCQs
               Q.1 A few substances are arranged in the increasing order of force of attraction
               between their particles. Which of the following represent a correct arrangement?
               a) air, sugar, oil                                 c) oxygen, water, sugar
               b) water, air wind                                 d) salt, juice, air
               Q.2 What is the human body temperature in Kelvin scale?
               a) 301 K                                           c) 273 K
               b) 310 K                                           d) 373 K
               Q.3 Which of the following is a non sublimable solid?
               a) Iodine                                          c) camphor
               b) common salt                                     d) Naphthalene balls
                       DIRECTION:Each of these questions contains an Assertion followed by Reason. Read them
                       carefully and answer the question on the basis of following options. You have to select the one that
                       best describes the two statements.
                       (a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
                       (b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
                       (c) If Assertion is correct but Reason is incorrect.

                       (d) If Assertion is incorrect but Reason is correct.
                       (e) If Assertion & Reason both are incorrect.
               Q.4 Assertion: Sugar dissolves faster in hot tea.
               Reason: Rate of diffusion increases with rise in temperature.
               Q.5 Assertion: Liquids have fixed volume but no fixed shape.
               Reason: The intermolecular forces are very weak.
               Q.6 What are the conditions for something to be called as matter?
               Q.7 When a crystal of copper sulphate is placed at the bottom of a beaker containing
               water, the water slowly turns blue. Why?
               Q.8 Give reasons: On heating the solids change into their liquid form
               Q.9 Droplets of water is seen on the outside surface of a glass tumbler containing ice
               cubes. Justify.
               Q.10 While going for a stroll in the evening Raju came across the smell of biscuits being
               baked in nearby locality. Answer the following questions based on his observations.
               (i) How could he get the smell of the biscuits being baked at a distance?
               (ii) Can he get the same smell few hours after the biscuits are baked? If no justify your

               answer.






               1
   1