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SAI International School
                                                      Class – VII

                                               Subject – Chemistry
                                              Topic – Animal Fibres
                                  Sub-Topic –Properties & Quality of Silk

                                               HOME ASSIGNMENT
               Objective:

              S.L                             Questions                                  Mar    Skill
              No.                                                                        k
              Q.1     Texture of the silk is                                             1      R
                      a) Soft, smooth & lustrous.    b) Rough c) Colourful
                      d)Hairy
              Q.2     Strongest natural fibre is known as
                                                                                         1      K
                      a) Wool    b) Silk c) Cotton d) Jute

              Q.3     Quality of silk depends on                                         1      K
                      a) Types of silk worm    b) Quality of mulberry leaf feed to
                      silk worm c) Selection of cocoon   d) All of these
              Q.4     --------------- fabric is cool to wear in summer and warn to use   1      K
                      in winter.
                      a) Wool    b) Silk c) Cotton   d) Jute
              Q.5     Absorption of moisture ability of silk fabric makes                1      U
                      a) Comfortable to wear    b) Soft to wear c) Uncomfortable to
                      wear   d) Comfortable to wear in summer
              For Assertion& Reason question follow the following directions.
              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.6      Assertion: Silk fabric can be used in all weather                 1      U&A
                       Reason: It is cool to wear in summer and warm to wear
                       in winter.
              Q.7     Assertion: Silk is called royal fabric.                            1      U&A

                      Reason: It is soft, smooth& lustrous and used by kings
                      queens and knights.







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