A)
I II III \[C{{l}^{-}}/\frac{1}{2}C{{l}_{2}}\] heat \[-0.42V\] heat C, heat
B)
I II III \[-0.36V\], C, heat C, heat
C)
I II III \[0.58V\] \[1.17V\] \[CH_{3}^{+}\]
D)
I II III \[NH_{2}^{-}\] C, heat C, heat
Correct Answer: C
Solution :
\[FeC{{r}_{2}}{{O}_{4}}+\underset{(II)}{\mathop{N{{a}_{2}}C{{O}_{3}}}}\,+\underset{(Air)}{\mathop{{{O}_{2}}}}\,\xrightarrow{Heat}2N{{a}_{2}}Cr{{O}_{4}}\] \[\xrightarrow{(II)\,\,N{{H}_{4}}Cl.\,Heat}\underset{(III)}{\mathop{2Al}}\,+C{{r}_{2}}{{O}_{3}}\xrightarrow{{}}2Cr+A{{l}_{2}}{{O}_{3}}\]
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