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SAI International School
                                                       Class-X

                                               Subject_ Chemistry
                                           Topic-Metal & Non metals
                            Subtopic- Chemical Bonding (Covalent Bonding)

                                                Home Assignment
               Objective-
               MCQs
              Q.1      Which of the following will contain covalent double bond between its atoms?
                       (a) H2                 (b) O2
                       (c) NaCl      (d) Cl2

              Q.2      As compare to ionic compounds, covalent bond has

                   A.  (a) high melting but low boiling point                         (b) low melting but high boiling point
                   B.  (c) low melting and boiling point                                 (d) high melting and boiling point
              Q.3       If no loss or gain of electrons occur by mixing of two atoms, we say that they may be
                       attached to each other due to

                   A.  (a) proton attraction                         (b) neutron attraction
                   B.  (c) sharing of electrons                     (d) opposite charges
                 ➢  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.4      Assertion :  Most of the covalent compounds are good conductors of electricity.
                       Reason : They do not dissociate to form ions and remain as molecules.

              Q.5      Assertion :  HCl is a covalent compound so cannot  conducts electricity..
                       Reason : HCl is a polar covalent molecule, it dissociates into it’s respective ions (H+ & Cl-)
                       and conducts electricity.









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