MCQ
Which ionic compound has the largest amount of lattice energy?
- A$NaF$
- B$AlF_3$
- C$AlN$
- D$MgF_2$
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then the solubility of $AB _{2}$ in pure water is......... $\times 10^{-4}$ $mol$ $L ^{-1}$.
[Assuming that neither kind of ion reacts with water]
[Given : mass of electron $=9.1 \times 10^{-31} \mathrm{~kg}$, Plank's constant $(\mathrm{h})=6.626 \times 10^{-34} \mathrm{JS}$ ]
(Value of $\pi=3.14$ )
| List $I$ (Amines) | List $II$ $\left( pK _{ b }\right)$ |
| $A$ Aniline | $I$ $3.25$ |
| $B$ Ethanamine | $II$ $3.00$ |
| $C$ $N-$Ethylethanamine | $III$ $9.38$ |
| $D$ $N, N-$Diethylethanamine | $IV$ $3.29$ |
Choose the correct answer from the options given below :-