Match the following aspects with the respective metal. Aspects Metal (a) The metal which reveals a maximum number of oxidation states (p) Scandium (b) The metal although placed in 3 d block is considered not as a transition element (q) Copper (c) The metal which does not exhibit variable oxidation states (r) Manganese (d) The metal which in + 1 oxidation state in aqueous solution undergoes disproportionation (s) Zinc

(a)-(r), (b)-(s), (c)-(p), (d)-(q)

(a)-(p), (b)-(s), (c)-(q), (d)-(r)

(a)-(r), (b)-(p), (c)-(s), (d)-(q)

(a)-(q), (b)-(s), (c)-(p), (d)-(r)

Match the following aspects with the respective metal. Aspects Metal (a) The metal which reveals a maximum number of oxidation states (p) Scandium (b) The metal although placed in 3 d block is considered not as a transition element (q) Copper (c) The metal which does not exhibit variable oxidation states (r) Manganese (d) The metal which in + 1 oxidation state in aqueous solution undergoes disproportionation (s) Zinc

(a)-(r), (b)-(s), (c)-(p), (d)-(q)

(a)-(p), (b)-(s), (c)-(q), (d)-(r)

(a)-(r), (b)-(p), (c)-(s), (d)-(q)

(a)-(q), (b)-(s), (c)-(p), (d)-(r)

Reason of lanthanoid contraction is:

Negligible screening effect of 'f’ orbitals

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The d- and f-Block Elements>NEET - 17th July 2022>Q 2

HARD

NEET

IMPORTANT

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In the neutral or faintly alkaline medium, ${KMnO}_{4}$ oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from

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Important Questions on The d- and f-Block Elements

EASY

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The d- and f-Block Elements>NEET - 12 September 2021>Q 3

Zr (Z = 40)

and

Hf (Z = 72)

have similar atomic and ionic radii because of:

HARD

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The d- and f-Block Elements>NEET - 12 September 2021>Q 4

The incorrect statement among the following is:

MEDIUM

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The d- and f-Block Elements>NEET Phase 2 (14 October 2020)>Q 5

Identify the incorrect statement from the following:

HARD

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The d- and f-Block Elements>NEET Phase 2 (14 October 2020)>Q 6

Match the following aspects with the respective metal.

	Aspects		Metal
(a)	The metal which reveals a maximum number of oxidation states	(p)	Scandium
(b)	The metal although placed in $3 d$ block is considered not as a transition element	(q)	Copper
(c)	The metal which does not exhibit variable oxidation states	(r)	Manganese
(d)	The metal which in $+ 1$ oxidation state in aqueous solution undergoes disproportionation	(s)	Zinc

EASY

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The d- and f-Block Elements>NEET - 13th September 2020>Q 7

The calculated spin only magnetic moment of

{Cr}^{2 +}

ion is

MEDIUM

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The d- and f-Block Elements>NEET - 5th May 2019>Q 8

The manganate and permanganate ions are tetrahedral, due to:

MEDIUM

NEET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - The d- and f-Block Elements>NEET - 6th May 2018>Q 9

Match the metal ions given in Column 'I' with the spin magnetic moments of the ions given in Column 'II'.

Column I	Column II
a. ${Co}^{3 +}$	i. $\sqrt{8} B . M .$
b. ${Cr}^{3 +}$	ii. $\sqrt{35} B . M .$
c. ${Fe}^{3 +}$	iii. $\sqrt{3} B . M .$
d. ${Ni}^{2 +}$	iv. $\sqrt{24} B . M .$
	v. $\sqrt{15} B . M$