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प्रश्न
Complete the reaction mentioning all the products formed:
\[\ce{2KMnO4 ->[\Delta]}\]
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उत्तर
\[\ce{2KMnO4 ->[\Delta] K2MnO4 + MnO2 + O2}\]
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संबंधित प्रश्न
When chromite ore FeCr2O4 is fused with NaOH in presence of air, a yellow-coloured compound (A) is obtained, which on acidification with dilute sulphuric acid gives a compound (B). Compound (B) on reaction with KCl forms an orange coloured crystalline compound (C).
(i) Write the formulae of the compounds (A), (B) and C.
(ii) Write one use of compound (C).
Complete the following chemical equation
8MnO4- + 3S2O32- + H2O →
Complete the following equations:Cr2O72- + 2OH- →
Complete the following equations : MnO4- + 4H+ + 3e- →
Give an example and suggest a reason for the following feature of the transition metal chemistry:
The lowest oxide of transition metal is basic, the highest is amphoteric/acidic.
E0 value for Mn3+ Mn2+ couple is much more positive than that for Cr3-/ Cr2-.
Zinc carbonate is precipitated from zinc sulphate solution by the addition of ___________.
Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride, gives brown-red vapours of ______.
Indicate the steps in the preparation of \[\ce{K2Cr2O2}\] from chromite ore.
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with SO2? Write the ionic equation for the reaction.
