Which of the alkali metal chloride (MCl) forms its dehydrate  (MCl.$2H_{2}O$) easily?

1. LiCl

2. CsCl

3. RbCl

4. KCl

Crude sodium chloride obtained by crystallization of brine solution does not contain-

1. $MgS{O}_4$

2. $N{a}_{2}S{O}_4$

3. $MgC{l}_2$

4. $CaS{O}_4$

Which of the following is an amphoteric hydroxide?

1.  $\mathrm{Be}{\left(\mathrm{OH}\right)}_2$

2.  $\mathrm{Sr}{\left(\mathrm{OH}\right)}_2$

3.  $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$

4.  $\mathrm{Mg}{\left(\mathrm{OH}\right)}_2$

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

1. $L{i}^{+}>N{a}^{+}>K^{+}>R{b}^{+}$

2. $N{a}^{+}>K^{+}>R{b}^{+}>L{i}^{+}$

3. $K^{+}>R{b}^{+}>N{a}^{+}>L{i}^{+}$

4. $R{b}^{+}>K^{+}>N{a}^{+}>L{i}^{+}$

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

1. $BaS{O}_4$

2. $MgS{O}_4$

3. $CaS{O}_4$

4. $SrS{O}_4$

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

1. $BeC{O}_3<MgC{O}_3<K_{2}C{O}_3<CaC{O}_3$

2. $BeC{O}_3<MgC{O}_3<CaC{O}_3<K_{2}C{O}_3$

3. $MgC{O}_3<BeC{O}_3<CaC{O}_3<K_{2}C{O}_3$

4. $K_{2}C{O}_3<MgC{O}_3<CaC{O}_3<BeC{O}_3$

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

1. MCl>Ml>MBr>MF

2. MF>MCl>MBr>Ml

3. MF>MCl>Ml>MBr

4. Ml>MBr>MCl>MF

Which one of the following compounds is a peroxide?

1. $K{O}_2$

2. $Ba{O}_2$

3. $Mn{O}_2$

4. $N{O}_2$

Among the given options, what is the property of the alkaline earth metals that increases with their atomic number?
1. Solubility of their hydroxides in water
2. Solubility of their sulphates in water
3. Ionization energy
4. Electro-negativity