Property of the alkaline earth metals that increases with their atomic number

• the solubility of their hydroxides in water

• the solubility of their sulphates in water

• ionisation energy 

• ionisation energy 

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy? 

• CaSO₄

• BeSO₄

• BaSO₄

• BaSO₄

383.

In the case of alkali metals, the covalent character decreases in the order

• MCl> MI>MBr>MF

• MF> MCl> MBr>MI

• MF > MCl> MI>MBr

• MF > MCl> MI>MBr

The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrieds decreases in which of the following orders?

• CsH > RbH > KH > NaH >LiH

• KH > NaH> LiH > CsH >RbH

• NaH > LiH >KH> RbH> CsH

• NaH > LiH >KH> RbH> CsH

The correct order of increasing thermal stability of K₂CO₃, MgCO₃, CaCO₃ and BeCO₃ is:

• BeCO₃ < MgCO₃ < K₂CO₃ <CaCO₃

• BeCO₃ < MgCO₃ < CaCO₃ <K₂CO₃

• MgCO₃ < BeCO₃ < CaCO₃ < K₂CO₃

• MgCO₃ < BeCO₃ < CaCO₃ < K₂CO₃

In which of the following the hydration energy is higher than the lattice energy? 

• BaSO₄

• MgSO₄

• RaSO₄

• RaSO₄

The correct order of the mobility of the alkali metal ions in aqueous solution is:

• Li⁺>Na⁺ > K⁺ > Rb⁺

• Na⁺>K⁺ > Rb⁺  > Li⁺

• K⁺ > Rb⁺ >Na⁺ > Li⁺

• K⁺ > Rb⁺ >Na⁺ > Li⁺

Which of the following oxides is most acidic in nature?

• MgO

• BeO

• CaO

• BaO

Among CaH₂, BeH₂, BaH₂, the order of ionic character is

• BeH₂< CaH₂<BaH₂

• CaH₂<BeH₂<BaH₂

• BaH₂<BeH₂<CaH₂

• BeH₂ < BaH₂ < CaH₂

Which of the following is the correct order of stability for the given superoxides?

• KO₂ < RbO₂ < CsO₂

• CsO₂ < RbO₂<KO₂

• RbO₂

• KO₂ < CsO₂ <RbO₂