p-Block Elements-I - Result Question 18
Assertion and Reason
Read the following questions and answer as per the direction given below :
(a) Statement I is correct; Statement II is correct Statement II is the correct explanation of Statement I
(b) Statement I is correct; Statement II is correct Statement II is not the correct explanation of Statement I
(c) Statement I is correct; Statement II is incorrect
(d) Statement I is incorrect; Statement II is correct
18.
Statement I $Al(OH) _3$ is amphoteric in nature.
Statement II $Al-O$ and $O-H$ bonds can be broken with equal ease in $Al(OH) _3$.
(1998, 2M)
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Answer:
Correct Answer: 18. (a)
Solution:
- Due to small size and high charge on $Al$ in $Al(OH) _3$ the fission ability of $Al-O$ and $O-H$ bonds become comparable and compound can give both $H^{+}$ and $HO^{-}$ under appropriate reaction conditions as:
$ \underset{\text { Base }}{Al(OH) _3}+3 HCl \longrightarrow AlCl _3+3 H _2 O $
$ Al(OH) _3+NaOH \longrightarrow Na\left[Al(OH) _4\right] $
Therefore, both statements are correct and statement II is a correct explanation of statement I.
BETA
