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प्रश्न
Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.
उत्तर
In \[\ce{Cr2O^{2-}_7}\] and \[\ce{CrO^{2-}_4}\], chromium shows +6 state, which is equal to its group number (6).
In \[\ce{MnO^-_4}\], it shows \[\ce{Mn^+_7}\] state, which is equal to its group number (7). In \[\ce{VO^-_3}\], it shows \[\ce{V^+_5}\] state, which is equal to its group number (5).
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संबंधित प्रश्न
Complete the following equations : 2 MnO2 + 4 KOH + O2 →
Complete the following chemical equation
Cr2O72- + 3Sn2+ + 14H+ →
Describe the preparation of potassium dichromate from iron chromite ore. What is the effect of increasing pH on a solution of potassium dichromate?
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with iron (II) ions? Write the ionic equation for the reaction.
Indicate the steps in the preparation of KMnO4 from pyrolusite ore.
Complete the following chemical equations :
Cu + H2SO4(conc.) →
Name a member of the lanthanoid series that is well-known to exhibit +2 oxidation state.
E0 value for Mn3+ Mn2+ couple is much more positive than that for Cr3-/ Cr2-.
Write the ionic equation showing the oxidation of Fe(II) salt by acidified dichromate solutions.
Which of the following reactions are disproportionation reactions?
(a) \[\ce{Cu^{+} -> Cu^{2+} + Cu}\]
(b) \[\ce{3MnO^{-}4 + 4H^{+} -> 2MnO^{-}4 + MnO2 + 2H2O}\]
(c) \[\ce{2KMnO4 -> K2MnO4 + MnO2 + O2}\]
(d) \[\ce{2MnO^{-}4 + 3Mn^{2+} + 2H2O -> 5MnO2 + 4H^{+}}\]
What is the effect of pH on dichromate ion solution?
The oxidation state of manganese in the product obtained in a reaction of potassium permanganate and hydrogen peroxide in a basic medium is ______.
Potassium permanganate on heating at 513 K gives a product which is ______.
Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride, gives brown-red vapours of ______.
Indicate the step in the preparation of K2Cr2O7 from chromite ore.
Indicate the steps in the preparation of \[\ce{K2Cr2O7}\] 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.
