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1. Some basic concept of chemistry — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry1. Some basic concept of chemistry1 Mark
MCQ
The equivalent weight of ${K_2}C{r_2}{O_7}$ in acidic medium
  • A
    $294$
  • B
    $298$
  • ✓
    $49$
  • D
    $50$
✓

Answer

Correct option: C.
$49$
c
(c) ${K_2}C{r_2}{O_7} + 3{H_2}S{O_4}\, \to {K_2}S{O_4} + C{r_2}{(S{O_4})_3} + 3\,(O) + 3{H_2}$

No. of electrons lossed $= 12 -6 = 6$ 

Equivalent weight $=\frac{M}{6} = \frac{{294}}{6} = 49$ .

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