| \[\left( X \right)+{{K}_{2}}C{{O}_{3}}+Air\xrightarrow{heat}\left( Y \right)\] |
| \[\left( Y \right)+C{{l}_{2}}\xrightarrow{{}}\left( Z \right)Pink\] |
| Which of the following is correct? |
A) \[X=black,\text{ }Mn{{O}_{2}},Y=Blue,\] \[{{K}_{2}}Cr{{O}_{4}},Z=KMn{{O}_{4}}\]
B) \[X=green,\text{ }C{{r}_{2}}{{O}_{3}},Y=Yellow,\] \[{{K}_{2}}Cr{{O}_{4}},\,\,Z={{K}_{2}}C{{r}_{2}}{{O}_{7}}\]
C) \[X=black,\text{ }Mn{{O}_{2}}\text{, }Y=green,\] \[{{K}_{2}}Mn{{O}_{4}},Z=KMn{{O}_{4}}\]
D) \[X=black,B{{i}_{2}}{{O}_{3}},\,\,Y=colourless\] \[KBi{{O}_{2}},Z=KBi{{O}_{3}}\]
Correct Answer: C
Solution :
[c] \[\underset{(X)}{\mathop{2Mn{{O}_{2}}}}\,+2{{K}_{2}}C{{O}_{3}}+\underset{(air)}{\mathop{{{O}_{2}}}}\,\xrightarrow{\Delta }\] \[2{{K}_{2}}\underset{\begin{smallmatrix} green \\ (Y) \end{smallmatrix}}{\mathop{Mn{{O}_{4}}}}\,+2C{{O}_{2}}\uparrow \] \[\underset{(Y)}{\mathop{2{{K}_{2}}Mn{{O}_{4}}}}\,+C{{l}_{2}}\xrightarrow{{}}\underset{(Z)\,Pink}{\mathop{2KMn{{O}_{4}}}}\,+2KCl\]
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