Download App

STD 11 - 7. Redox reactions — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 7. Redox reactions4 Marks
MCQ
Oxidation state of $Fe$ in $F{e_3}{O_4}$ is
  • A
    $\frac{3}{2}$
  • B
    $\frac{4}{5}$
  • C
    $\frac{5}{4}$
  • ✓
    $\frac{8}{3}$
✓

Answer

Correct option: D.
$\frac{8}{3}$
(d) $\mathop F\limits^ * {e_3}{O_4}$

$3x + ( - 8) = 0$; $3x - 8 = 0$

$3x = 8$; $x = \frac{8}{3}$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Equal volumes of $0.1\, M$ $AgNO_3$ and $0.2\, M$ $NaCl$ mixed. The concentration of $NO_3^-$ ion in the mixture will be ............ $\mathrm{M}$
→
The number of nodal planes $'d'$ orbital has
→
What will be the mass of a particle if uncertainty in its position is $10^{-8}\, m$ and uncertainty in velocity is $5.26 \times 10^{-25}\, m\, s^{-1}$ ? ............... $\mathrm{kg}$
→
$(NH_4 )_2Cr _2O_7$ on heating liberates a gas. The same gas will be obtained by
→
The $IUPAC$ name of Gammexane is
→
Number of unpaired electrons in inert gas is
→
Dative bond is present in
→
Primary and secondary amines are distinguished by
→
Which one of the following lanthanides exhibits $+2$ oxidation state with diamagnetic nature ? (Given $\mathrm{Z}$ for $\mathrm{Nd}=60, \mathrm{Yb}=70, \mathrm{La}=57, \mathrm{Ce}=58$ )
→
The reaction ${H_2}S + {H_2}{O_2} \to 2{H_2}O + S$ shows
→