NEET 2021 | d and f Block Elements Question 8 | Chemistry

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NEET 2021

MCQ (Single Correct Answer)

-1

Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of :

Having similar chemical properties

Belonging to same group

Diagonal relationship

Lanthanoid contraction

NEET 2020 Phase 1

MCQ (Single Correct Answer)

-1

Identify the incorrect statement.

The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.

Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.

The oxidation states of chromium in CrO₄^2- and Cr₂O₇^2- are not the same.

Cr²⁺ (d⁴) is a stronger reducing agent than Fe²⁺ (d⁶) in water.

NEET 2018

MCQ (Single Correct Answer)

-1

Which one of the following ions exhibits d-d transition and paramagnetism as well?

CrO₄^2-

Cr₂O₇^2–

MnO₄^-

MnO₄^2-

NEET 2018

MCQ (Single Correct Answer)

-1

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code :

Column - I	Column - II
A. Co³⁺	(i) $$\sqrt 8 $$ B.M.
B. Cr³⁺	(ii) $$\sqrt {35} $$ B.M.
C. Fe³⁺	(iii) $$\sqrt 3 $$ B.M.
D. Ni²⁺	(iv) $$\sqrt {24} $$ B.M.
	(v) $$\sqrt {15} $$ B.M.

A	B	C	D
(iv)	(v)	(ii)	(i)

A	B	C	D
(i)	(ii)	(iii)	(iv)

A	B	C	D
(iv)	(i)	(ii)	(iii)

A	B	C	D
(iii)	(v)	(i)	(ii)

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