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प्रश्न
Complete the following equations : MnO4- + 4H+ + 3e- →
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उत्तर
MnO4- + 4H+ + 3e- → MnO2 + 2H2O
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संबंधित प्रश्न
Complete the following equations : 2 MnO2 + 4 KOH + O2 →
Describe the preparation of potassium dichromate from iron chromite ore. What is the effect of increasing pH on a solution of potassium dichromate?
Indicate the steps in the preparation of KMnO4 from pyrolusite ore.
Which of the following is amphoteric oxide?
\[\ce{Mn2O7, CrO3, Cr2O3, CrO, V2O5, V2O4}\]
KMnO4 is coloured due to ______.
Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride, gives brown-red vapours of ______.
Complete the following ionic equation:
\[\ce{Cr2O^{2-}7 + 2OH^- ->}\]
Indicate the steps in the preparation of \[\ce{K2Cr2O2}\] from chromite ore.
Indicate the step in the preparation of K2Cr2O7 from chromite ore.
Indicate the steps in the preparation of \[\ce{K2Cr2O7}\] from chromite ore.
