AIPMT 2003 | d and f Block Elements Question 55 | Chemistry

AIPMT 2003

MCQ (Single Correct Answer)

-1

Which one of the following characteristics of the transition metals is associated with their catalytic activity?

High enthalpy of atomization

Paramagnetic behaviour

Colour of hydrated ions

Variable oxidation states

AIPMT 2003

MCQ (Single Correct Answer)

-1

The basic character of the transition metal monoxides follows the order
(Atomic no's. Ti = 22, V = 23, Cr = 24, Fe = 26)

VO > CrO > TiO > FeO

CrO > VO > FeO > TiO

TiO > FeO > VO > CrO

TiO > VO > CrO > FeO

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

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

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

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

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

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