p-Block Elements-I - Result Question 48
####19. Match the following.
$(2006,6 M)$
| Column I | Column II | ||
|---|---|---|---|
| A. | $Bi^{3+} \rightarrow(BiO)^{+}$ | p. | Heat |
| B. | $\left AlO _2\left\lceil\rightarrow Al(OH) _3\right.\right.$ | q. | Hydrolysis |
| C. | $SiO _4^{4-} \rightarrow Si _2 O _7^{6-}$ | r. | Acidification |
| D. | $\left(B _4 O _7^{2-}\right) \rightarrow\left[B(OH) _3\right]$ | s. | Dilution by water |
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Answer:
Correct Answer: 19. $F$
Solution:
- (A) $Bi^{3+}$ hydrolysis to $(BiO)^{+}-q$.
(B) $\left[AlO _2\right\rceil$ exist in basic medium, on acidification gives $Al(OH) _3-r$.
(C) Orthosilicate $\left(SiO _4^{4-}\right)$ on heating changes into pyrosilicate $Si _2 O _7^{6-}-p$
(D) Tetraborate ion $\left[B _4 O _7^{2-}\right]$ on treatment with dil. acid hydrolysis gradually to orthoboric acid $-q, r$.
