AIPMT 2003 | d and f Block Elements Question 66 | Chemistry

AIPMT 2003

MCQ (Single Correct Answer)

-1

The correct order of ionic radii of Y³⁺, La³⁺, Eu³⁺ and Lu³⁺ is
(Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71)

Y³⁺ < La³⁺ < Eu³⁺ < Lu³⁺

Y³⁺ < Lu³⁺ < Eu³⁺ < La³⁺

Lu³⁺ < Eu³⁺ < La³⁺ < Y³⁺

La³⁺ < Eu³⁺ < Lu³⁺ < Y³⁺

AIPMT 2002

MCQ (Single Correct Answer)

-1

General electronic configuration of lanthanides is

$$\left( {n - 2} \right){f^{1 - 14}}\,\left( {n - 1} \right){s^2}{p^6}{d^{0 - 1}}\,n{s^2}$$

$$\left( {n - 2} \right){f^{0 - 14}}\,\left( {n - 1} \right){d^{0 - 1}}\,n{s^2}$$

$$\left( {n - 2} \right){f^{0 - 14}}\,\left( {n - 1} \right){d^{10}}\,n{s^2}$$

$$\left( {n - 2} \right){d^{0 - 1}}\left( {n - 1} \right)\,{f^{1 - 14}}\,n{s^2}$$

AIPMT 2002

MCQ (Single Correct Answer)

-1

Which of the following shows maximum number of oxidation states?

AIPMT 2002

MCQ (Single Correct Answer)

-1

Zn gives H₂ gas with H₂SO₄ and HCl but not with HNO₃ because

Zn act as oxidising agent when react with HNO₃

HNO₃ is weaker acid than H₂SO₄ and HCl

In electrochemical series Zn is above hydrogen

NO$$_3^ - $$ is reduced in preference to hydronium ion.

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