HARD

Earn 100

Which of the following statements are INCORRECT?

A. All the transition metals except scandium form $MO$ oxides which are ionic.
B. The highest oxidation number corresponding to the group number in transition metal oxides is attained in ${Sc}_{2} O_{3}$ to ${Mn}_{2} O_{7}$ .
C. Basic character increases from $V_{2} O_{3} to V_{2} O_{4} to V_{2} O_{5}$ .
D. $V_{2} O_{4}$ dissolves in acids to give ${VO}_{4}^{- 3}$ salts.
E. $CrO$ is basic but ${Cr}_{2} O_{3}$ is amphoteric.

Choose the correct answer from the options given below:

45.45% studentsanswered this correctly

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

Magnetic moment

2.83

BM is given by which of the following ions?
(At.nos.

T i = 22, C r = 24, M n = 25, N i = 28)

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]

EASY

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

Consider the hydrated ions of

T i^{2 +}, V^{2 +}, T i^{3 +}

and

S c^{3 +}

. The correct order of their spin-only magnetic moments is:

MEDIUM

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

{[P d (F) (C l) (B r) (I)]}^{2 -}

has

n

number of geometrical isomers. Then, the spin-only magnetic moment and crystal field stabilization energy

[C F S E]

{[F e {(C N)}_{6}]}^{n - 6}

, respectively, are:
[Note: Ignore the pairing energy]

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

)

HARD

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

If the magnetic moment of a di-oxygen species is

1.73 B . M .

, it may be

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 of the following statement is wrong?

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

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 correct order of the calculated spin-only magnetic moments of complexes

(A)

(D)

is:

(A)

N i {(C O)}_{4}

(B)

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

(C)

N a_{2} [N i {(C N)}_{4}]

(D)

P d C l_{2} {(P P h_{3})}_{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?

MEDIUM

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

The correct order of the spin-only magnetic moments of the following complexes is:

(I)

[C r {(H_{2} O)}_{6}] B r_{2}

(I I)

N a_{4} [F e {(C N)}_{6}]

(I I I)

N a_{3} [F e {(C_{2} O_{4})}_{3}] (Δ_{0} > P)

(I V)

{(E t_{4} N)}_{2} [C o C l_{4}]

EASY

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

For the following Assertion and Reason, the correct option is:
Assertion: For hydrogenation reactions, the catalytic activity increases from Group

5

to Group

11

metals with maximum activity shown by Group

7 - 9

elements.
Reason: The reactants are most strongly adsorbed on group

7 - 9

elements.

HARD

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

Among the statements

(a) - (d)

, the incorrect ones are:

(a)

Octahedral

C o (I I I)

complexes with strong field ligands have very high magnetic moments

(b)

When

∆_{0} < P

, the d-electron configuration of

C o (I I I)

in an octahedral complex is

t_{e g}^{4} e_{g}^{2}

(c)

Wavelength of light absorbed by

{[C o {(e n)}_{3}]}^{3 +}

is lower than that of

{[{C o F}_{6}]}^{3 -}

(d)

If the

∆_{0}

for an octahedral complex of

C o (I I I)

18,000 c m^{- 1}

, the

∆_{t}

for its tetrahedral complex with the same ligand will be

16,000 c m^{- 1}

EASY

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

The calculated spin only magnetic moment of

{Cr}^{2 +}

ion is

HARD

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

What are interstitial compounds?

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?

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

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:

Important Questions on The d- and f-Block Elements

Learn and Prepare for any exam you want !