Position of d-Block and f-Block Elements in Periodic Table

What is the difference between zinc and mica?

Which of the following is not a transition element?

Which of the following statement is incorrect for pair of elements $\mathrm{Zr} - \mathrm{Hf}$?

The general electronic configuration of transition element is

The group which belongs to transition series is

The $5\mathrm{d}$ series of transition metals have more frequent metal-metal bonding in their compounds than do the $3\mathrm{d}$ and $4\mathrm{d}$ metals. Explain.

What is meant by disproportionation ? Give example of disproportionation reaction in aqueous solution.

Gadolinium $\left(\mathrm{Gd}\right)$ has $4{\mathrm{f}}^{7}5{\mathrm{d}}^{1}6{\mathrm{s}}^2$ electronic configuration outside the $\left[\mathrm{Xe}\right]$ core. Find spin magnetic moment of ${\mathrm{Gd}}^{3+}$

Which of the following actinoids show oxidation states upto $+7$?

Which of the following titanium compounds cannot be prepared? (Atomic No. of $\mathrm{Ti} = 22$).

Write two examples of mixed oxides and give their equivalent oxides.

What is the number of unpaired electrons in ${\mathrm{Cu}}^{+}$?

The formula of Prussian blue is_____.

(A) ${\mathrm{KFe}}^{\mathrm{III}} \left[{\mathrm{Fe}}^{\mathrm{II}}\right(\mathrm{CN}{)}_6]$

(B) ${\mathrm{K}}_2{\mathrm{Fe}}^{\mathrm{III}} \left[{\mathrm{Fe}}^{\mathrm{II}}\right(\mathrm{CN}{)}_6]$

(C) ${\mathrm{K}}_{{}_3}{{\mathrm{Fe}}_3}^{\mathrm{III}} \left[{\mathrm{Fe}}^{\mathrm{II}}\right(\mathrm{CN}{)}_6]$

Enter the correct answer as A, B or C.

${\mathrm{CrO}}_3$ is an acidic hydride of _____.

The formula of chromite is _____.

(A) ${\mathrm{FeCr}}_2{\mathrm{O}}_4$

(B) ${\mathrm{Fe}}_3{\mathrm{Cr}}_2{\mathrm{O}}_4$

(C) ${\mathrm{Fe}}_2{\mathrm{Cr}}_3{\mathrm{O}}_4$

Enter the correct answer as A, B or C.

$\mathrm{Ti} \left(\mathrm{III}\right)$ compounds are coloured while $\mathrm{Ti} \left(\mathrm{IV}\right)$ compounds are colourless.

 In ${\mathrm{Cr}}_2{{\mathrm{O}}_7}^{2-}$, all $\mathrm{Cr}-\mathrm{O}$ bonds are equivalent.

Why ${\mathrm{Zn}}^{2+}$ salts are colourless and ${\mathrm{Ni}}^{2+}$ salts are coloured?

How many unpaired electrons are present there in each of the following?

${\mathrm{Fe}}^{3+},{\mathrm{Co}}^{2+},{\mathrm{Zn}}^{2+}$

Which of the following ion are expected to be coloured.

${\mathrm{Ni}}^{2+},{\mathrm{Ti}}^{3+},{\mathrm{Cu}}^{+},{\mathrm{Sc}}^{3+},{\mathrm{Zn}}^{2+}.$