LiF is sparingly soluble in water because it has:

1. partial covalent character.
2. small electronegativity.
3. high lattice enthalpy.
4. low hydration enthalpy.

The structures of beryllium chloride in solid-state, and vapor state are :

1. Dimer, and Linear, respectively.

2. Chain in both.

3. Chain, and dimer, respectively.

4. Linear in both.

HCl was passed through a solution of CaCl₂, MgCl₂, and NaCl. Compound(s) that get crystallize is/are-

1. Only NaCl

2. Only MgCl₂

3. NaCl, MgCl₂, and CaCl₂

4. Both MgCl₂ and CaCl₂

Identify the correct statement from the following:

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

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

1. LiCl

2. CsCl

3. RbCl

4. KCl

The most acidic oxide among the following is - 
1. MgO
2. BeO
3. BaO
4. CaO

In context with beryllium, which one of the following statements is incorrect?

1. It is rendered passive by nitric acid
2. It forms ${\mathrm{Be}}_2\mathrm{C}$
3. Its salts rarely hydrolyze
4. Its hydride is electron-deficient and polymeric