Page 1 - 4. HOME ASSIGNMENT (CH-2 CONCEPT OF ACIDS & BASES)
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SAI International School
                                                       Class-X

                                               Subject_ Chemistry
                                          Topic- Acids, Bases & Salts
                                   Sub Topic- Concept of Acids & Bases

                                               HOME ASSIGNMENT
               OBJECTIVE:
               MCQs
                 Q.1  An aqueous solution turns red litmus solution blue. Excess addition of which
                       of the following solution would reverse the change?

                       (a) Baking powder                                         (b) Lime
                       (c) Ammonium hydroxide solution                  (d) Hydrochloric acid

                 Q.2  Which among the following is not a base? (a) NaOH (b) KOH (c) NH4OH (d)
                       C2H5 OH

                 Q.3  Which of the following are present in a dilute aqueous solution of
                       hydrochloric acid?

                                                                                          –
                                                                              +
                                 +
                                           –
                       (a)  H3O   +  Cl                   (b)  H3O   +  OH
                       (c) Cl  + OH –                                                                        (d) unionised HCl
                            –
                    ➢  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:  H2CO3 is a strong acid.
                       Reason: A strong acid dissociates completely or almost completely in water.

                 Q.5
                       Assertion: Weak acids have low electrical conductivity.
                       Reason: Strong acids and weak acids have equal concentration of hydrogen
                       ions in their solutions.








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