MCQ
$PbI_4$ does not exist because
- Aiodine is not a reactive
- ✓$Pb(IV)$ is oxidizing and $I^-$ is strong reducing agent
- C$Pb(IV)$ is less stable than $Pb(II)$
- D$Pb^{4+}$ is not easily formed
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

| List $I$ Element detected | List $II$ Reagent used/Product formed |
| $A$ Nitrogen | $I.$ $Na _2\left[ Fe ( CN )_5 NO \right]$ |
| $B$ Sulphur | $II.$ $AgNO _3$ |
| $C$ Phosphorous | $III.$ $Fe _4\left[ Fe ( CN )_6\right]_3$ |
| $D$ Halogen | $IV.$ $\left( NH _4\right)_2 MoO _4$ |
Choose the correct answer from the options given below:
Calculate $\Delta {T_b}$ if ${K_f} = 1.86$ and ${K_b} = 0.521$.