D And F Block Elements Mock Tests

44 questions available

D And F Block Elements Mock Test 1

Questions: 30

D And F Block Elements Mock Test 2

Questions: 14

Sample Questions

NEET Chemistry

Which of the following is the correct order of lanthanoid contraction?

A Increases with increasing atomic number

B Decreases with increasing atomic number

C Remains constant across the series

D First increases then decreases

NEET Chemistry

Which of the following explains the catalytic property of transition metals?

A High ionization energy

B Ability to adopt multiple oxidation states and form complexes

C Large atomic size

D Paramagnetic nature

Class 12 Chemistry

Which of the following oxides of transition metals is the most acidic?

A MnO

B MnO₂

C Mn₂O₃

D Mn₂O₇

JEE Main Chemistry

The number of unpaired electrons in Cr³⁺ ion (atomic number of Cr = 24) is:

A 1

B 2

C 3

D 4

NEET Chemistry

The lanthanoid contraction is responsible for which of the following observations?

A The atomic radii of Zr (40) and Hf (72) are nearly identical

B The acidic character of Cr₂O₃ is greater than CrO₃

C Lanthanum is less reactive than cerium

D The first ionization enthalpy of La is greater than that of Lu

JEE Main Chemistry

Which of the following reactions is used in the Hall-Heroult process?

A Electrolytic reduction of Al₂O₃

B Electrolytic oxidation of Al₂O₃

C Thermal reduction of Fe₂O₃

D Electrolytic reduction of CuO

JEE Main Chemistry

The colour of transition metal compounds is due to:

A charge transfer

B d-d electron transition

C p-s electron transition

D s-p electron transition

JEE Main Chemistry

Lanthanoid contraction is caused by:

A Incomplete shielding of nuclear charge by 4f electrons

B Complete shielding by 4f electrons

C High atomic number

D Loss of 6s electrons

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