Page 1 - 2. HA (Practice WS-8)
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SAI International School
                                                         Class-X

                                                 Subject_ Chemistry
                                      Topic-Ch-1(Full) , Ch- 2(Full) & Ch-3
                                                 Practice Worksheet

               Objective-
               Q1.A dilute solution of sodium carbonate was added to two test tubes - one containing
               dil HCl (a) and the other containing dilute NaOH(b). The correct observation was-
               (a) a brown coloured gas liberated in test tube A                      [  A+Av ] (1mark)
               (b) a brown coloured gas liberated in test tube B
               (c) a colourless gas liberated in test tube A
               (d) a colourless gas liberated in test tube B

               Q.2. You are having five solutions A, B, C D and E  with pH values as follows: A=1.8,
               B=7, C =8.5, D = 8 and E = 5
               Which  solution  would  be  most  likely  to  liberate hydrogen with magnesium powder?
               (a) Solution A and B         (b) Solution A
               (c) Solution C                   (d) All of the above                                  [  A+D ] (1mark)

                Q.3 A metal M  has electronic configuration 2, 8, 3 and occurs in earth’s crust and its
                oxide M2O3 . It is more reactive than zinc. Which of the following options (s) is/are
                correct?                                                                      [  A+D ] (1mark)
               (a) The metal M  is iron
               (b) The metal M  is lead
               (c) The ore from which metal M  is extracted is haematite.
               (d) The ore from which metal M  is extracted is bauxite.
                .


                       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.

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