Anomalous Behavior of Lithium Halogens

Q. Molar heat capacity of aluminium is 25 JK–1 mol–1. The heat necessary to raise the temperature of 54 g of aluminium (Atomic mass 27 g mol–1) from 30°C to 50°C is

Q. Is AlCl3 more soluble in water than NaCl ?
If so why.
Should we compare the solubility on basis of covalent character, or lattice energy, or hydration energy?

Q. What is oxidation number and ionic charge? what is the difference between them?

Q. A closed tube is filled with liquid $\rho =800{\text{kg/m}}^3$. It is rotating about an axis shown in figure with an angular velocity $\omega =4\text{rad/sec}$ and length of the tube is $9\text{m}$. Find the pressure difference between the ends of the tube.

1. $2\text{bar}$
2. $1\text{bar}$
3. $1.512\text{bar}$
4. $1.728\text{bar}$

Q. The correct statements among the following are:

I. Due to greater polarizing power of $L{i}^{+}$, $L{i}_{2}C{O}_3$ is most stable
II. $LiHC{O}_3$ does not exist as solid
III. $NaN{O}_3$ on strong heating gives $NaN{O}_2$ whereas $LiN{O}_3$ will give $L{i}_{2}O$
IV. Sodium & Potassium ions are involved in the transport of sugars and amino acids into the cells
V. $LiF$ is less soluble due to smaller hydration energy of $L{i}^{+}$ ion

1. I, II & V

2. III, IV & V

3. II, III & IV

4. I, III & V

Q. whiah of the following is most soluble in water?
a) BeCo3
b) MgCo3
c) SrCo3
d) BaCo3

Q.

Does an aqueous solution of Mg2+ ions have larger entropy before or after hydration of ions?

Q. Lithium chloride is soluble in organic solvent such as or alcohol but sodium chloride is not why

Q. Which one of the alkali metals forms only the normal oxide $M_{2}O$ on heating in air?

1. Rb

2. K

3. Li

4. Na

Q. Which one of the alkali metals forms only the normal oxide $M_{2}O$ on heating in air?

1. Rb

2. K

3. Li

4. Na

Q.

Which of the following statements are correct

I. Both $LiCl$ and $MgC{l}_2$ are soluble in ethanol

II. Both $LiCl$ and $MgC{l}_2$ are deliquescent

III. $LiCl$ and $MgC{l}_2$ form hydrates like $LiCl.8H_{2}O$ and $MgC{l}_2.2H_{2}O$

IV. $NaHC{O}_3$ used as fire extinguisher

1. I, II, III correct
2. I, II, IV correct
3. Only III correct
4. All are correct

Q.

Be and Mg sulphate are soluble in water but Cr, Sr & Ba sulphate are not soluble in water . why?