Page 1 - HOME ASSIGNMENT-2(CH-2-PRACTICE WORK SHEET
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SAI International School
                                                         Class-X

                                                 Subject_ Chemistry
                                            Topic- Acids, Bases & Salts
                                         Sub Topic- pH in Every Day Life

                                                   Ch-1Full & Ch- 2
                                                       Worksheet

               Q.1 CuO + (X) "  CuSO4+H2O. Here (X) is-
                   (a) CuSO4                (b) HCl
                   (c) H2SO4                (d) HNO3

                Q.2 On prolong supply of CO2(g) water), it is observed that

                       (a) lime solution changes to gaseous state
                    (b) the milkiness of lime water disappears
                    (c) the milkiness of lime water changes from white to red.
                       (d) the colour of lime water becomes black

               Q.3 The pH of a solution is 4.0. What should be the change in the hydrogen ion
               concentration of the solution,  if its pH is to increased to 5.0.
                   (a) decreases to 1/10 of its original concentration
                   (b) halved
                   (c) doubled
                   (d) increases by 10 times

                         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  : The acidity of Mg (OH)2  is two.
                        Reason : The acidity of a base is equal to the number of hydroxyl ions.

               Q.5 Assertion : To dilute concentrated sulphuric acid water is added to the acid slowly.
                      Reason  :  A  lot  of  heat  energy  will  be  given  out  in  the  dilution  of  concentrated
               sulphuric acid.

               Q.6 2 mL of sodium hydroxide solution is added to a fewpieces of granulated zinc metal
               taken in a test tube.When the contents are warmed, a gas evolves which is bubbled
               through a soap solution before testing. Write the equation for the chemical reaction
               involved and the test to detect the gas. Name the gas which will be evolved when the
               same metal reacts with dilute solution of a strong acid.           [CBSE 2018]

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