MCQ
The alkene which give only $CH _3 CHO$ after ozonolysis and hydrolysis is :
- Aethene
- Bpropene
- Cbut-1-ene
- ✓but-2-ene
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${P_4} + 10C{l_2}\xrightarrow{\Delta }PC{l_5}$
Total number of optically active isomers shown by $\mathrm{C}_4 \mathrm{H}_8 \mathrm{Cl}_2$, obtained in the above reaction is......................