Consider the isoelectronic species, ${\mathrm{Na}}^{+},<mspace\; width="1em"></mspace>{\mathrm{Mg}}^{2+},<mspace\; width="1em"></mspace>{\mathrm{F}}^{-},<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{O}}^{2-}$. The correct order of increasing length of their radii is :

1. ${\mathrm{F}}^{-}<{\mathrm{O}}^{2-}<{\mathrm{Mg}}^{2+}<{\mathrm{Na}}^{+}$

2. ${\mathrm{Mg}}^{2+}<{\mathrm{Na}}^{+}<{\mathrm{F}}^{-}<{\mathrm{O}}^{2-}$

3. ${\mathrm{O}}^{2-}<{\mathrm{F}}^{-}<{\mathrm{Na}}^{+}<{\mathrm{Mg}}^{2+}$

4. ${\mathrm{O}}^{2-}<{\mathrm{F}}^{-}<{\mathrm{Mg}}^{2+}<{\mathrm{Na}}^{+}$

The correct order of size of the given species is: 

Match the elements given in List-I with the atomic radius given in List-II the correct atomic radius with the corresponding element.

Given are the following sets of species:

(a) ${\mathrm{Zn}}^{2+},<mspace\; width="1em"></mspace>{\mathrm{Ca}}^{2+},<mspace\; width="1em"></mspace>{\mathrm{Ga}}^{3+},<mspace\; width="1em"></mspace>{\mathrm{Al}}^{3+}$

(b) ${\mathrm{K}}^{+},\hspace{0.17em}{\mathrm{ Ca}}^{2+},<mspace\; width="1em"></mspace>{\mathrm{Sc}}^{3+},\hspace{0.17em}{\mathrm{Cl}}^{-}$

(c) ${\mathrm{P}}^{3-},<mspace\; width="1em"></mspace>{\mathrm{ S}}^{2-},<mspace\; width="1em"></mspace>{\mathrm{Cl}}^{-},<mspace\; width="1em"></mspace>{\mathrm{K}}^{+}$

(d) ${\mathrm{Ti}}^{4+},<mspace\; width="1em"></mspace>\mathrm{Ar},<mspace\; width="1em"></mspace>{\mathrm{Cr}}^{3+},<mspace\; width="1em"></mspace>{\mathrm{V}}^{5+}$

The sets containing only isoelectronic ions are:

1. (a) and (d)

2. (b) and (c)

3. (c) and (d)

4. (b) and (d)

In which following options of arrangement does not agree with the variation of the property indicated against it?

Choose the correct option

The ionic radii vary in :

Choose the correct option :

1. (a), (c)

2. (b), (c)

3. (c), (d)

4. (b), (d)