D & f- BLOCK ELEMENTS practice · Medium

Statement I: In square planar complex $\text{d}_{\text{x}^2-\text{y}^2}$ is higher in energy than $\mathrm{d}_{\mathrm{z}^2}$

Statement II: Ligand approach along $\mathrm{x}$ and $\mathrm{y}$ axis in square planar complex.

Thermal decomposition of zinc nitrate gives:

Identify correct statements from below:
A. The chromate ion is square planar.
B. Dichromates are generally prepared from
chromates.
C. The green manganate ion is diamagnetic
D. Dark green coloured $\mathrm{K}_2 \mathrm{MnO}_4$ disproportionates
in a neutral or acidic medium to give
permanganate.
E. With increasing oxidation number of transition
metal, ionic character of the oxides decreases.
Choose the correct answer from the options given
below:

Which of the following statements is not true?

Assertion (A): $\mathrm{Ti}^{3+}$ acts as an oxidizing agent.

Reason (R): Due to inert pair effect, $\mathrm{Ti}^{+}$ is more stable than $\mathrm{Ti}^{3+}.$

‘Hydride gap’ is referred to which region of the Periodic Table?

In which one of the following four pairs of oxides are both oxides amphoteric?

Which one of the following pairs of elements is called ‘chemical twins’ because of their very similar chemical properties?

Which of the following are correct order of the enthalpy of hydration of $\mathrm{Ca}^{+2}, \mathrm{Mn}^{+2}$ and $\mathrm{Zn}^+2$

Pure conc. $\mathrm{HN}{\mathrm{O}_3}$ makes iron passive as the surface is covered with protective layer of:

The spin only magnetic moment of $\mathrm{F}{\mathrm{e}^{2 + }}$ ion (in BM) is approximately.

Consider the reactions
$\mathrm{(A)}\,\,\,\,{H_2}O + 2HI \to {I_2} + 2{H_2}O$
$\mathrm{(B)}\,\,\,\,HOCl + {H_2}{O_2} \to {H_3}{O^ + } + C{l^ - } + {O_2}$
Which of the following statement is correct about ${H_2}{O_2}$ with reference to these reactions? Hydrogen peroxide is ____

The amphoteric oxide among $\mathrm{V}_2 \mathrm{O}_3,$ $\mathrm{V}_2 \mathrm{O}_4$ and $\mathrm{V}_2 \mathrm{O}_5$ upon reaction with alkali leads to formation of an oxide anion. The oxidation state of V in the oxide anion is:

Magnetic moment 2.84 BM is given by

In the reaction ${Cr}_2{O}_7{ }^{2-}+{SnCl}_2+{H}^{+} \rightarrow {SnCl}_4+{CrCl}_3+{H}_2{O}$

Solder is an alloy of

Assertion: Highest oxidation states of $d$-block metals are usually seen in oxides and oxoanions.

Reason: Oxygen is capable of forming $pr-dr$ bonds with transition metals.

$\mathrm{KMnO}_4 \xrightarrow{\Delta} \mathrm{X}+\mathrm{Y}+\mathrm{Z}$

In this chemical reaction X, Y and Z are:

Blister copper is:

Compound(s) useful in the battery industries is/are

The correct order of decreasing Second ionisation enthalpy of $Ti,\,V,\,Cr$ and $Mn$ is

From gold aurocyanide $\mathrm{Na}\left[ {\mathrm{Au}{{\left( {\mathrm{CN}} \right)}_2}} \right]$, gold can be precipitated by adding powder of:

Approximate percentage of lanthanoids in mischmetall is

The form of iron having the highest carbon content is

Coinage alloy has the composition of:

Which of the following metal nitrate can show given change.

${\text{Aqueous solution of metal nitrate}}\xrightarrow[{{\text{N}}{{\text{H}}_{\text{4}}}{\text{OH}}}]{{{\text{Excess}}}}\left( {{\text{No change in colour and no precipitate in test tube}}} \right){\text{ }}$

The metal that shows highest and maximum number of oxidation state is:

For which of the following pairs, magnetic moment is same?

Which of the following ions exhibits d-d transition and para magnetism as well?

A compound of vanadium chloride has spin only magnetic moment of $1.73 \mathrm{~Bm}$. Its formula is