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

  • question_answer   Compare the chemistry of actinoids with that of lanthanoids with reference to : (a) Electronic configuration                                                                                                                                                          1 (b) Oxidation states                                                                                                                                                        1 (c) Chemical reactivity.                                                                                                                                                  1



    Property Actinoides Lanthanoides
    (a) Electronic configuration The actinoides invove the filling of The lanthanoides involve the gradual filling of .                1
    (b) Oxidation states Actinoides show oxidation state such as +3 but they also show +2, +4,+5,+6 oxidation state, i.e., Uranium. Lanthanoides show mainly +3 oxidation state except in few cases where it is +2 and +4.                     1 
    (c) Chemical reactivity (i)They do not form complexes easily. (ii) They do not form oxacation . (iii) Their compounds are less basic. (iv) They are non- radioactive. (v) Their magnetic properties can be easily explained. (i) They have much greater tendency to form complexes. (ii) They form oxacations such as . (iii) Their compounds are more basic. (iv) They are radioactive. (v) their magnetic properties cannot be easily explained.


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