The melting point of ${\mathrm{Mn}}_4\mathrm{N}$ is

Important Questions on d and f Block Elements

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

Find the metallic and ferromagnetic substance.

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

The colour and magnetic nature of manganate ion $\left({\mathrm{MnO}}_4^{2-}\right)$ is-

MEDIUM

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

A compound of vanadium chloride has spin only magnetic moment of $1.73$ BM. Its formula is

MEDIUM

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

The statement that is INCORRECT about the interstitial compounds is:

HARD

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

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

MEDIUM

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

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

HARD

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

Maximum number of covalent bonds formed by $N$ and $P$ are -

MEDIUM

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

Magnetic moment $2.83$ BM is given by which of the following ions?
(At.nos. $\mathrm{T}\mathrm{i}=22,\mathrm{C}\mathrm{r}=24,\mathrm{ }\mathrm{M}\mathrm{n}=25,\mathrm{ }\mathrm{N}\mathrm{i}=28)$

HARD

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

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

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

When heated in air, brown copper powder turns black. This black powder would turn brown again when heated with

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

The metal that gives hydrogen gas upon treatment with both the acid as well as the base is

MEDIUM

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

The pair of metal ions that can give a spin only magnetic moment of $3.9BM$ for the complex $\left[M{\left(H_{2}O\right)}_6\right]C{l}_2$ , is:

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

Consider the hydrated ions of $\mathrm{T}{\mathrm{i}}^{2+},\mathrm{ }{\mathrm{V}}^{2+},\mathrm{ }\mathrm{T}{\mathrm{i}}^{3+}$ and $\mathrm{S}{\mathrm{c}}^{3+}$ . The correct order of their spin-only magnetic moments is:

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

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

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

The correct order of the first ionization enthalpies is:

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition 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.

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

Reason of lanthanoid contraction is:

HARD

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

Spin only magnetic moment $2.84\mathrm{\hspace{0.17em}}\mathrm{BM}$ is given by:

(Atomic Number of $\mathrm{Ni}=28,\mathrm{Ti}=22,\mathrm{Cr}=24,\mathrm{Co}=27$)

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

The transition elements that has the lowest enthalpy of atomisation is:

EASY

Chemistry>Inorganic Chemistry>d and f Block Elements>General Properties of the Transition Elements

Match the catalysts to the correct process.
 

	Catalyst		Process
A.	$\mathrm{T}\mathrm{i}\mathrm{C}{\mathrm{l}}_3$	i.	Wacker process
B.	$\mathrm{P}\mathrm{d}\mathrm{C}{\mathrm{l}}_2$	ii.	Ziegler – Natta polymerisation
C.	$\mathrm{C}\mathrm{u}\mathrm{C}{\mathrm{l}}_2$	iii.	Contact process`
D.	${\mathrm{V}}_2{\mathrm{O}}_5$	iv.	Deacon’s process