# Solution - Some Important Compounds of Transition Elements - Oxides and Oxoanions of Metals

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#### Question

Complete the following equations

MnO4- + 4H+ + 3e- →

#### Solution

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2 Na2CrO4 + 2 H + →​

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Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with (i) iron(II) ions (ii) SO2 and (iii) oxalic acid? Write the ionic equations for the reactions.

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Complete the following equation :

2MnO_4^(-)+6H^++5NO_2^(-)rarr

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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).

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(ii) Write one use of compound (C).

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#### Reference Material

Solution for concept: Some Important Compounds of Transition Elements - Oxides and Oxoanions of Metals. For the courses 12th CBSE (Arts), 12th CBSE (Commerce), 12th CBSE (Science), PUC Karnataka Science
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