A) V only
B) I and III
C) I, III, IV, V
D) III, IV
Correct Answer: D
Solution :
ppt. of \[A{{g}_{2}}Cr{{O}_{4}},A{{g}_{2}}C{{O}_{3}}\] are soluble in \[N{{H}_{4}}OH\]due to formation of\[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}}\]. Green ppt. of \[Ni{{(OH)}_{2}}\] is soluble in \[N{{H}_{4}}OH\] due to formation of \[{{[Ni{{(N{{H}_{3}})}_{6}}]}^{2+}}\] \[A{{g}_{2}}Cr{{O}_{4}}+4N{{H}_{4}}OH\xrightarrow{{}}2{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}}\] \[+CrO_{4}^{2-}+4{{H}_{2}}O\] \[A{{g}_{2}}C{{O}_{3}}+4N{{H}_{4}}OH\xrightarrow{{}}2{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}}\]\[+CO_{3}^{2-}+4{{H}_{2}}O\] \[\underset{\text{Green ppt}\text{.}}{\mathop{Ni{{(OH)}_{2}}}}\,+8N{{H}_{4}}OH\xrightarrow{{}}{{[Ni{{(N{{H}_{3}})}_{6}}]}^{2+}}\] \[+4O{{H}^{-}}+6{{H}_{2}}O\] \[Fe{{(OH)}_{3}}\]is insoluble in\[N{{H}_{4}}OH\]. \[Al{{(OH)}_{3}}\]is insoluble in\[N{{H}_{4}}OH\].You need to login to perform this action.
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