12th Class Chemistry Sample Paper Chemistry Sample Test Paper-3

  • question_answer   Account for the following : (a)  ions are not stable in aqueous solution.                                                                                                                1 (b) Most of the transit metal ions exhibit paramagnetic behavior.                                                                             1


                      (a) is unstable in aqueous solution due to lower hydration energy and higher reduction potential.  1                                                                              (b) The transition elements involve the partial filling of d-sub shells. Most of the transition metal ions have unpaired electrons in d-sub shell (from). Therefore, they give rise to paramagnetic character.         1


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