Chemistry - Complete s-block Question with Solution | TestHub

How many of the following orders are correct?

(i) Ionisation energy : $\mathrm{Li}>\mathrm{Na}>\mathrm{K}>\mathrm{Rb}>\mathrm{Cs}$

(ii) Melting point: $\mathrm{Li}>\mathrm{Na}>\mathrm{K}>\mathrm{Rb}>\mathrm{Cs}$

(iii) Reducing nature (in gaseous state): $\mathrm{Li}>\mathrm{Cs}>\mathrm{Rb}>\mathrm{K}>\mathrm{Na}$

(iv) Thermal stability : $\mathrm{LiH}>\mathrm{NaH}>\mathrm{KH}>\mathrm{RbH}>\mathrm{CsH}$

(v) Thermal stability : $\mathrm{Ba}(\mathrm{OH}{)}_2>\mathrm{Sr}(\mathrm{OH}{)}_2>\mathrm{Ca}(\mathrm{OH}{)}_2$

(vi) Solubility in water : ${\mathrm{BeCO}}_3>{\mathrm{MgCO}}_3>{\mathrm{CaCO}}_3>{\mathrm{SrCO}}_3$

(vii) Solubility in water : ${\mathrm{BeSO}}_4>{\mathrm{MgSO}}_4>{\mathrm{CaSO}}_4>{\mathrm{SrSO}}_4$

(viii) Melting point : $\mathrm{NaF}>\mathrm{NaCl}>\mathrm{NaBr}>\mathrm{NaI}$

(ix) Solubility in water : $\mathrm{LiF}>\mathrm{LiCl}>\mathrm{LiBr}>\mathrm{LiI}$