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 among the above are:

1. (a), (d)

2. (b), (c)

3. (c), (d)

4. (b), (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)