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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.
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उत्तर
In \[\ce{VO^{3-}_4}\] (Vanadate ion), Vanadium shows the +5 oxidation state, which is equal to its group number (5).
In \[\ce{Cr2O^{2-}_7}\] (Dichromate ion) and \[\ce{Cr^{2-}_4}\] (Chromate ion), chromium shows the +6 oxidation state, which is equal to its group number (6).
In \[\ce{MnO^-_4}\] (Permagnate ion), Manganese shows the +7 oxidation state, which is equal to its group number (7).
संबंधित प्रश्न
Complete the following equation:
\[\ce{2MnO4- + 6H+ + 5NO2- ->}\]
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 : 2 Na2CrO4 + 2 H + →
Complete the following chemical equation
Cr2O72- + 3Sn2+ + 14H+ →
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 K2Cr2O7 from chromite ore.
Write the formula of an oxo-anion of Manganese (Mn) in which it shows the oxidation state equal to its group number.
Complete the following equation :
Complete the following chemical equations :
Cu + H2SO4(conc.) →
Write the ionic equation showing the oxidation of Fe(II) salt by acidified dichromate solutions.
Using IUPAC norms, write the formula of potassium trioxalatochromate(III).
When \[\ce{Cu^2+}\] ion is treated with \[\ce{KI}\], a white precipitate is formed. Explain the reaction with the help of chemical equation.
The product formed upon heating methyl bromide with potassium tert-butoxide is
Indicate the steps in the preparation of \[\ce{K2Cr2O7}\] from chomite ore.
Indicate the steps in the preparation of \[\ce{K2Cr2O7}\] 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.
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with SO2? Write the ionic equation for the reaction.
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid? Write the ionic equation for the reaction.
