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AIIMS 2013
Exam
AIIMS
Year
2013
Subject
Chemistry
Chapter
d and f Block Elements

AIIMS 2013 · Chemistry · d and f Block Elements

K_2 Cr_2 O_7 in acidic medium converts into

K2Cr2O7\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7 in acidic medium converts into

Options

  1. ACr2+\mathrm{Cr}^{2+}
  2. BCr3+\mathrm{Cr}^{3+}
  3. CCr4+\mathrm{Cr}^{4+}
  4. DCr5+\mathrm{Cr}^{5+}

Correct answer

B. Cr3+\mathrm{Cr}^{3+}

Step-by-step solution

Cr2O72−+14H++6e−⟶2Cr3++7H2O\mathrm{Cr}_2 \mathrm{O}_7^{2-+} 14 \mathrm{H}^{+}+6 e^{-} \longrightarrow 2 \mathrm{Cr}^{3+}+7 \mathrm{H}_2 \mathrm{O}
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