AP EAMCET · Chemistry · Some Basic Concepts of Chemistry
0.1 mole of potassium permanganate was heated at \(300^{\circ} \mathrm{C}\). What is the weight (ing) of the residue?
\((\mathrm{Mn}=55 \mathrm{u} ; \mathrm{K}=39 \mathrm{u} ; \mathrm{O}=16 \mathrm{u})\)
- A 14.2
- B 1.6
- C 15.8
- D 7.1
Answer & Solution
Correct Answer
(A) 14.2
Step-by-step Solution
Detailed explanation
\(2 \mathrm{KMnO}_4 \xrightarrow{300^{\circ} \mathrm{C}} \underbrace{\mathrm{K}_2 \mathrm{MnO}_4+\mathrm{MnO}_2}_{\text {Solid residue }}+\mathrm{O}_2\) Molecular weight of \(\mathrm{KMnO}_4=158 \mathrm{u}\) Mole \(=0.1\)…
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