Solved papers for JEE Main & Advanced AIEEE Solved Paper-2009

done AIEEE Solved Paper-2009

  • question_answer1) Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect?     AIEEE  Solved  Paper-2009

    A) Because of the large size of the Ln (III) ions the bonding in its compounds is predominantly ionic in character.

    B) The ionic sizes of Ln (III) decrease in general with increasing atomic number.

    C) Ln (III) compounds are generally colourless

    D) Ln (III) hydroxides are mainly basic in character.

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  • question_answer2) In context with the transition elements, which of the following statements is incorrect?     AIEEE  Solved  Paper-2009

    A) In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes.

    B) In the highest oxidation states, the transition metal show basic character and form cationic complexes.

    C) In the highest oxidation states of the first five transition element (Sc to Mn), all the 4s and 3d electrons are used for bonding.

    D) Once the \[{{d}^{5}}\] configuration is exceeded, the tendency to involve all the 3d electrons in bonding decreases.

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