An element A in a compound ABD has oxidation number –n. It is oxidised by Cr 2 O 7 2– in…
Chemistry · JEE Advanced · NTA Exams — Some Basic Concepts in Chemistry
An element A in a compound ABD has oxidation number –n. It is oxidised by Cr2O72– in acidic medium. In the experiment, 1.68 × 10–3 moles of K2Cr2O7 were used for 3.36 × 10–3 moles of ABD. The new oxidation number of A after oxidation is :
- 3
- 3 – n
- n –3
- + n
Answer
(B) 3 – n
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