EASY

Earn 100

Which of the following statements are correct?

(A) The $M^{3 +} / M^{2 +}$ reduction potential for iron is greater than manganese.

(B) The higher oxidation states of first row d-block elements get stabilized by oxide ion

(C) Aqueous solution of ${Cr}^{2 +}$ can liberate hydrogen from dilute acid

(D) Magnetic moment of $V^{2 +}$ is observed between $4.4 - 5.2 BM$

Choose the correct answer from the options given below:

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Important Questions on The d- and f-Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Identify the oxidation states of Titanium

(Z = 22)

and Copper

(Z = 29)

in their colourless compounds.

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The correct statement(s) about

C r^{2 +}

and

M n^{3 +}

is (are)

[Atomic number of Cr = 24 and Mn = 25]

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Which group contains coloured ions out of

$(1) {Cu}^{2 +}$ $(2) {Ti}^{4 +}$ $(3) {Co}^{2 +}$ $(4) {Fe}^{2 +}$

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Which of the following arrangements does not represent the correct order of the property stated against it?

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Explain giving reasons :

The $E ° (M^{2 +} / M)$ value for copper is positive (0.34 V).

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The pair of metal ions that can give a spin only magnetic moment of

3.9 B M

for the complex

[M {(H_{2} O)}_{6}] C l_{2}

, is:

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

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

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Which of the following are the transition metal ions responsible for colour in ruby and emerald respectively?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The spin-only magnetic moment value of

M^{3 +}

ion (in gaseous state) from the pairs

{Cr}^{3 +} / {Cr}^{2 +}, {Mn}^{3 +} / {Mn}^{2}, {Fe}^{3 +} / {Fe}^{2 +}

and

{Co}^{3 +} / {Co}^{2 +}

that has negative standard electrode potential, is_____

B . M .

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The standard electrode potential (

M^{3 +} / M^{2 +}

) for

V, Cr, Mn

Co

are

- 0.26 V, - 0.41 V, + 1.57 V

and

+ 1.97 V

, respectively. The metal ions which can liberate

H_{2}

from a dilute acid are

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The equation which is balanced and represents the correct product(s) is

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Give reasons:

E °

value for

{Mn}^{3 +} {Mn}^{2 +}

couple is much more positive than that for

{Fe}^{3 +} {Fe}^{2 +}

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Spin only magnetic moment

2 .84 BM

is given by:

(Atomic Number of

Ni =28, Ti =22, Cr =24, Co =27

)

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The highest value of the calculated spin only magnetic moment (in

BM

) among all the transition metal complexes is

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

A compound of vanadium chloride has spin only magnetic moment of

1.73

BM. Its formula is

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The statement that is INCORRECT about the interstitial compounds is:

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Which one of the following species is stable in aqueous solution?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

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. $\sqrt{15} B . M$

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Why is

{Cr}^{2 +}

reducing and

{Mn}^{3 +}

oxidising when both have

d^{4}

configuration?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

In which of the following divalent transition metal ions have positive standard reduction potential at

298 K ?

Important Questions on The d- and f-Block Elements

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