MCQ
The petrol having octane number $80$ has
- ✓$20\%$ normal heptane + $80\%$ iso-octane
- B$80\%$ normal heptane + $20\%$ iso-octane
- C$20\%$ normal heptane + $80\%$ normal octane
- D$80\%$ normal heptane + $20\%$ normal octane
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Reason : In the complex, the coordination number of $Fe$ is $6$.
$\mathrm{NaCl}+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{Conc} .) \rightarrow(\mathrm{A})+$ Side products
$(\mathrm{A})+\mathrm{NaOH} \rightarrow(\mathrm{B})+$ side product
$(\mathrm{B})+\mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{dilute})+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow(\mathrm{C})+$ Side product
The sum of the total number of atoms in one molecule each of $(A), (B)$ and $(C)$ is