MCQ
Using the provided information in the following paper chromatogram the calculate $R _{ f }$ value of $A$ .......... $\times 10^{-1}$
- A$2$
- B$1$
- ✓$4$
- D$3$
✓
Answer
Correct option: C.
$4$
c
$R _{ f }=\frac{\text { Distance travelled by compound }}{\text { Distance travelled by solvent }}$
$R _{ f }=\frac{\text { Distance travelled by compound }}{\text { Distance travelled by solvent }}$
on chromatogram distance travelled by cmopound is $\rightarrow 2 \,cm$
Distance travelled by solvent $=5\, cm$
So $R _{ f }=\frac{2}{5}=4 \times 10^{-1}=0.4$
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