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प्रश्न
In the two tetrahedral structures of dichromate ion, ______.
पर्याय
4 Cr–O bonds are equivalent in length
6 Cr–O bonds are equivalent in length
All Cr–O bonds are equivalent in length
All Cr–O bonds are non-equivalent
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उत्तर
In the two tetrahedral structures of dichromate ion, 6 Cr–O bonds are equivalent in length.
Explanation:
The Dichromate di-anion is made up of two tetrahedral molecules that share oxygen at their common corner. The structure of the chromate ion is tetrahedral. Due to resonance, the six terminal bonds in the dichromate ion have the same bond length. As a result, all six Cr–O bonds are equivalent.
6 Cr–O bonds are equivalent
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संबंधित प्रश्न
Complete the following equations : 2 Na2CrO4 + 2 H + →
Complete the following equations:Cr2O72- + 2OH- →
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.
On addition of small amount of \[\ce{KMnO4}\] to concentrated \[\ce{H2SO4}\], a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.
In the form of dichromate, \[\ce{Cr (VI)}\] is a strong oxidising agent in acidic medium but \[\ce{Mo (VI)}\] in \[\ce{MoO3}\] \[\ce{and W (VI)}\] in \[\ce{WO3}\] are not because:
(i) \[\ce{Cr(VI)}\] is more stable than \[\ce{Mo(VI)}\] and \[\ce{and W(VI)}\].
(ii) \[\ce{Mo(VI)}\] and \[\ce{and W(VI)}\] are more stable than \[\ce{Cr(VI)}\].
(iii) Higher oxidation states of heavier members of group-6 of transition series are more stable.
(iv) Lower oxidation states of heavier members of group-6 of transition series are more stable.
Potassium permanganate on heating at 513 K gives a product which is ______.
Complete the reaction mentioning all the products formed:
\[\ce{2KMnO4 ->[\Delta]}\]
Indicate the steps 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.
