The passage represents a qualitative analysis flow diagram: (I) [Yellow ppt.] (A) [Gives blue colour — p Block Elements Chemistry Question
Question
The passage represents a qualitative analysis flow diagram: (I) [Yellow ppt.] $\xleftarrow{\text{K}_2\text{CrO}_4}$ (A) [Gives blue colour to the flame] $\xrightarrow{\Delta}$ (B) [Brown Gas] $\xrightarrow{\text{Gas (H), Very low temp.}}$ (C) [Blue colour liquid] $\xrightarrow{\text{H}_2\text{O}}$ (D) (A) $\xrightarrow{\text{H}_2\text{S}}$ (F) [Black ppt.] $\xrightarrow{\text{dil. HNO}_3}$ (G) [Vapour] + (H) [Gas] (H) $\xrightarrow{\text{FeSO}_4 + \text{H}_2\text{SO}_4}$ (E) [Complex compound]
💡 Solution & Explanation
Step 1: Note that under anhydrous conditions, aluminium chloride exists as a covalent dimer, Al2Cl6. Step 2: Upon dissolving in water, the hydration of the aluminum center causes ionic dissociation. Step 3: According to the specific textbook solution key, this dissociation is represented by the formation of complex ions [AlCl2(H2O)4]+ and [AlCl4(H2O)2]-, matching option (c).