question_answer

Consider the following order:

(i) \[\operatorname{HF} > HCl > HBr > HI\]: Lewis basic character

(ii) \[C{{H}_{4}}<CC{{l}_{4}}<C{{F}_{4}}:\] Electronegativity of central ?C? - atom

(iii) \[M{{g}^{2+}}<{{K}^{+}}<{{S}^{2-}}<S{{e}^{2-}}:\]Ionic radius

(iv) \[Ni>Pd>Pt:\] Ionisation energy

(v) \[A{{s}^{5+}}>S{{b}^{5+}}>B{{i}^{5+}}\]: Stable oxidation state

(vi) \[LiF>NaF>KF>RbF:\] Lattice energy

(vii) \[{{F}^{-}}\text{(}aq.\text{)}>C{{l}^{-}}\,\,\text{(}aq.\text{)}>B{{r}^{-}}\text{(}aq.\text{)}>{{I}^{-}}\text{(}aq.\text{)}\]: Electrical conductance

(viii) \[L{{i}^{+}}<M{{g}^{2+}}<A{{l}^{3+}}\]: Hydration energy

(ix) \[Cl>Br>F>I:\] Electron affinity

(x) \[BeC{{l}_{2}}<AlC{{l}_{3}}<SiC{{l}_{4}}:\] Lewis acidic character.

Then calculate value of (x - y), where x and y are correct and incorrect orders respectively.

Answer:

4