A) \[Zn{{(OH)}_{2}}\]
B) \[Al{{(OH)}_{3}}\]
C) \[Cr{{(OH)}_{3}}\]
D) \[CaC{{O}_{3}}\]
Correct Answer: C
Solution :
Chromium hydroxide, \[Cr{{(OH)}_{3}},\]when reacts with \[\text{NaOH}\] and \[N{{a}_{2}}{{O}_{2}},\]gives sodium chromate, which is yellow in colour. \[3N{{a}_{2}}{{O}_{2}}+2Cr{{(OH)}_{3}}\xrightarrow[{}]{{}}\underset{yellow}{\mathop{2N{{a}_{2}}Cr{{O}_{4}}}}\,\] \[2{{H}_{2}}O+2NaOH\]You need to login to perform this action.
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