Page 2 - 4. HOME ASSIGNMENT (CH-2 CONCEPT OF ACIDS & BASES)
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SUBJECTIVE:
                 S.LNo.                               Questions                                Mark  Skill
                 Q.1                                                                           1       R
                           Column II gives nature of acids and bases mention in column
                          I, match them correctly.


                               Cloumn I                 Cloumn II
                               (A)   HCl                (p)   strong acid

                               (B)   HCN                (q)   weak acid
                               (C)   NaOH               (r)    weak base

                               (D)   NH4OH              (s)   strong base

                 Q.2                                                                           1       u
                          True/False:
                          There are a variety of strengths when you study acids and
                          bases.
                 Q.3                                                                           3       R+A
                          What are strong and weak acids? In the following list of acids,
                          separate strong acids from weak acids. Hydrochloric acid, citric
                          acid, acetic acid, nitric acid, formic acid, sulphuric acid.
                 Q.4                                                                           3       U+A
                          (a) Why does aqueous solution of an acid conduct
                          electricity?

                                                                        +
                          (b)  How  does  the  concentration  of  H3O   ions  change
                                  when a solution of an acid is diluted?
                          (c)  Which  one  has  a  higher  pH,  a  concentrated  or  a
                                  dilute solution of hydrochloric acid?
                 Q.5                                                                           5       HOT
                          a.   Define indicator. Name two indicators obtained from plants.

                          b. Write a balanced chemical equation for the reaction taking
                          place when sodium oxide reacts with water. How will this
                          solution behave towards phenolphthalein and red litmus
                          paper?
                          c. State what happens when  sodium  hydroxide solution reacts
                          with hydrochloric acid.
                          [CBSE 2016]

























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