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

1. Solubility of their hydroxides in water.

2. Solubility of their sulphates in water.

3. Ionisation energy.

4. Electronegativity.

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

1. MCl>MI>MBr>MF

2. MF>MCl>MBr>MI

3. MF>MCl>MI>MBr

4. MI>MBr>MCl>MF

The thermal stability of these hydrides decreases in which of the following orders?

(1) CsH > RbH > KH > NaH > LiH

(2) KH > NaH > LiH > CsH > RbH

(3) NaH > LiH > KH > RbH > CsH

(4) LiH > NaH > KH > RbH > CsH

Which of the following compounds has a positive enthalpy of solution?

(1) LiF                                       

 (2) LiCl

(3) LiBr                                       

(4) Lil

An alkaline earth metal sulphate that has hydration enthalpy higher than the lattice enthalpy is -

1. CaSO₄               

2. BeSO₄

3. BaSO₄               

4. SrSO₄

An active ingredient in bleaching powder for bleaching action is -

1. Ca(OCl)₂             

2. CaO₂Cl

3. CaCl₂                 

4. CaOCl₂

A compound that releases CO₂ most easily upon heating is -

1. K₂CO₃                                 

2. Na₂CO₃

3. MgCO₃                                 

4. CaCO₃

Which of the following metal on burning in moist air does not give the smell of ammonia?

1. Mg                               

2. Ca

3. K                                 

4. Li

Among the carbonates of alkali metals which one has highest thermal stability?

(1) $C{s}_{2}C{O}_3$                 

(2) $R{b}_{2}C{O}_3$                     

(3) $K_{2}C{O}_3$                   

(4) $N{a}_{2}C{O}_3$

Incorrect statement is:

(a)$NaHC{O}_3$ and $KHC{O}_3$ have same crystal structure

(b) On heating $LiN{O}_3$ decomposes into $L{i}_{2}O$ and $N{O}_2$

(c) Among alkali metals, Li metal impart red colour to flame 

(d) $L{i}_{2}S{O}_4$ does not form alum