Match the following: Column I (A) $\mathrm{Bi}^{3+} \longrightarrow(\mathrm{BiO})^{+}$ (B) $\left[\mathrm{AlO}_{2}\right]^{-} \longrightarrow \mathrm{Al}(\mathrm{OH})_{3}$ (C) $\mathrm{SiO}_{4}^{4-} \longrightarrow \mathrm{Si}_{2} \mathrm{O}_{7}^{6-}$ (D) $\left(\mathrm{B}_{4} \mathrm{O}_{7}^{2-}\right) \longrightarrow\left[\mathrm{B}(\mathrm{OH})_{3}\right]$ Column II (P) Heat (Q) Hydrolysis (R) Acidification (S) Dilution by water

JEE Advanced · 2006 · 09 Apr 2006 · p-Block Elements

Match the following:

Column I
(A)

Bi^{3 +} ⟶ (BiO)^{+}

(B)

[AlO_{2}]^{-} ⟶ Al (OH)_{3}

(C)

SiO_{4}^{4 -} ⟶ Si_{2} O_{7}^{6 -}

(D)

(B_{4} O_{7}^{2 -}) ⟶ [B (OH)_{3}]

Column II
(P) Heat
(Q) Hydrolysis
(R) Acidification
(S) Dilution by water

Answer: A → II, B → III, C → I, D → II, D → III

Solution

**(A)

Bi^{3 +} \to (BiO)^{+}

:** Bismuth(III) ions undergo hydrolysis in water to form bismuthyl ion. Matches Q (Hydrolysis).

**(B)

[AlO_{2}]^{-} \to Al (OH)_{3}

:** Aluminate ion is converted to aluminum hydroxide by acidification (adding acid to basic solution). Matches R (Acidification).

**(C)

SiO_{4}^{4 -} \to Si_{2} O_{7}^{6 -}

:** Orthosilicate condenses to pyrosilicate upon heating (dehydration/condensation). Matches P (Heat).

**(D)

B_{4} O_{7}^{2 -} \to [B (OH)_{3}]

:** Borate ion converts to boric acid by both hydrolysis and acidification. Matches Q (Hydrolysis) and R (Acidification).

Answer: A→Q; B→R; C→P; D→Q,R

JEE Advanced · 2006 · 09 Apr 2006 · Match the columns

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JEE Advanced · 2006 · 09 Apr 2006 · p-Block Elements

Solution

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