Hydration Enthalpy and Lattice Enthalpy (Group 2)

Q.

The correct order of thermal stability of alkali metal hydrides is:

1. CsH>RbH> KH >NaH>LiH

2. LiH>NaH> KH >RbH>CsH

3. CsH>NaH> KH >RbH>LiH

4. LiH> KH >NaH>RbH>CsH

Q.

Which of the following hydroxides of alkaline earth metals is least basic

1. 
2. 
3. $Ba{\left(OH\right)}_2$
4. 

Q. Which of the following cations cannot give borax bead test?

1. $M{n}^{2+}$
2. $A{g}^{+}$
3. $C{r}^{3+}$
4. $C{o}^{2+}$

Q. Which of the following alkaline earth metals has lowest ionic mobility in solutions?

1. Be
2. Mg
3. Ba
4. Sr

Q.

Why s block element called alkali metals?

Q. Heat of hydration is maximum for

1. 
2. 
3. 
4. 

Q. Which of the following alkaline earth metal ions has the smallest heat of hydration?

1. 
2. 
3. 
4. 

Q.

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

1. It forms $B{e}_{2}C$

2. Its salts rarely hydrolyze

3. It is rendered passive by nitric acid

4. Its hydride is electron-deficient and polymeric

Q.

Which of the following molecule has the maximum ionic character?

1. Cs - Cl

2. Al - Cl

3. C - Cl

4. H - Cl

Q.

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

1. $BeS{O}_4$

2. $BaS{O}_4$

3. $CaS{O}_4$

4. $SrS{O}_4$

Q. Which technique would allow for a determination of the specific elements present in a sample of unknown constituents?

1. Filtration
2. Flame test
3. Distillation
4. Chromatography

Q. $ZnC{o}_2{O}_4$ is also known as Rinmann's green.

Q.

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

1. Ionisation energy

2. Solubility of their hydroxides

3. Solubility of their sulphates

4. Electronegativity

Q.

Which compound will show the highest lattice energy?

1. CsF

2. RbF

3. KF

4. NaF