NEET d-Block Elements- Properties & Uses Practice Questions With Solutions

NEET Chemistry d-Block Elements- Properties & Uses Practice Questions

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Question 1.

The E° value for the Mn ³⁺ /Mn ²⁺ couple is more positive than that of Cr ³⁺ /Cr ²⁺ or Fe ³⁺ /Fe ²⁺ due to change of:

Ad⁵ to d²configuration

Bd⁴ to d⁵configuration

Cd³to d⁵configuration

Dd⁵ to d⁴configuration

Question 2.

Which of the following set of ions act as oxidizing agents?

A$\mathrm{Ce}^{4+} $ and $\mathrm{Tb}^{4+}$

B$\mathrm{La}^{3+} $ and $\mathrm{Lu}^{3+}$

C$\mathrm{Eu}^{2+} $ and $\mathrm{Yb}^{2+}$

D$\mathrm{Eu}^{2+} $ and $\mathrm{Tb}^{4+}$

Question 3.

The stability of Cu²⁺ is greater than that of Cu⁺ salts in an aqueous solution due to:

ASecond ionisation enthalpy

BFirst ionisation enthalpy

CEnthalpy of atomization

DHydration energy

Question 4.

Identify the pair of Lanthanoides with one strong oxidant and one strong reductant:

ACe(IV), Tb(IV)

BYb(II), Eu(II)

CEu(IV), Lu(III)

DCe(IV), Eu(II)

Question 5.

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:

A+6 to +5

B+7 to +4

C+6 to +4

D+7 to +3

Question 6.

The incorrect statement among the following is:

ALanthanoids are good conductors of heat and electricity.

BActinoids are highly reactive metals, especially when finely divided.

CActinoid contraction is greater for element to element than Lanthanoid contraction.

DMost of the trivalent Lanthanoid ions are colourless in the solid-state.

Question 7.

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

ALanthanoid contraction

BHaving similar chemical properties

CBelonging to the same group

DDiagonal relationship

Question 8.

The calculated spin only magnetic moment of Cr²⁺ ion is:

A1. 4.90 BM

B2. 5.92 BM

C3. 2.84 BM

D4. 3.87 BM

Question 9.

Identify the incorrect statement.

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

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

CThe oxidation states of chromium in CrO₄^2– and Cr₂O₇^2– are not the same.

DCr²⁺(d⁴) is a stronger reducing agent than Fe²⁺(d⁶) in water.

Question 10.

Urea reacts with water to form A which will decompose to form B. B when passed through $\left(Cu\right)^{2 +}$ (aq), deep blue colour solution C is formed. What is the formula of C from the following?

A$\left[Cu \left(NH_{3}\right)_{4}\right]^{2 +}$

B$Cu \left(\right. OH \left.\right)_{2}$

C$CuCO_{3} . Cu (OH)_{2}$

D$CuSO_{4}$

Question 1.

Which of the following ions displays the d-d transition and paramagnetism?

1.	$\mathrm{CrO}_4^{2-} $	2.	$\mathrm{Cr}_2 \mathrm{O}_7^{2-} $
3.	$\mathrm{MnO}_4^{-} $	4.	$\mathrm{MnO}_4^{2-}$

A$\mathrm{CrO}_4^{2-} $

B$\mathrm{Cr}_2 \mathrm{O}_7^{2-} $

C$\mathrm{MnO}_4^{-} $

D$\mathrm{MnO}_4^{2-}$

Question 2.

A gas that can readily decolorize an acidified KMnO₄ solution is:

A

{SO}_{2}

B

{NO}_{2}

C

P_{2} O_{5}

D

{CO}_{2}

Question 3.

The reason for a greater range of oxidation states in actinoids is attributed to:

AActinoid contraction

B5f, 6d and 7s levels having comparable energies.

C4f and 5d levels being close in energies.

DThe radioactive nature of actinoids

Question 4.

When copper is heated with conc. HNO₃ it produces:

ACu(NO₃) and NO

BCu(NO₃)₂, NO and NO₂

CCu(NO₃)₂ and N₂O

DCu(NO₃)₂ and NO₂

Question 5.

Zinc can be coated on iron to produce galvanised iron, but the reverse is not possible because:

AZinc is lighter than iron.

BZinc has a lower melting point than iron.

CZinc has a lower negative reduction potential than iron.

DZinc has a higher negative reduction potential than iron.

Question 6.

Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified KMnO₄ for complex oxidation?

A

F e S O_{4}

B

F e S O_{3}

C

F e C_{2} O_{4}

D

F e {(N O_{2})}_{2}

Question 7.

Which of the following processes does not involve the oxidation of iron?

ARusting of iron sheets

BDecolourisation of blue CuSO₄ solution by iron

CFormation of Fe(CO)₅from Fe

DLiberation of H₂ from steam by iron at high temperature

Question 8.

The incorrect statement among the following regarding interstitial compounds is:

AThey are chemically reactive.

BThey are much harder than the pure metal.

CThey have a higher melting point than pure metals.

DThey retain metallic conductivity.

Question 9.

Four successive members of the first series of the transition metals are listed below. For which one of them does the standard potential $(E °_{M^{2 +} / M})$ value have a positive sign?

ANi (Z = 28)

BCu (Z = 29)

CFe (Z = 26)

DCo (Z = 27)

Question 10.

Which of the following exhibits only a +3 oxidation state?

ATh

BAc

CPa

DU

NEET d-Block Elements- Properties & Uses Practice Questions With Solutions

NEET Chemistry d-Block Elements- Properties & Uses Practice Questions

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Question 2.

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Question 9.

Question 10.

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Question 10.

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1.	\(\mathrm{CrO}_4^{2-} \)	2.	\(\mathrm{Cr}_2 \mathrm{O}_7^{2-} \)
3.	\(\mathrm{MnO}_4^{-} \)	4.	\(\mathrm{MnO}_4^{2-}\)