MCQ
The adsorption of hydrogen by platinum black is called:
- AHydrogenation
- BReduction
- ✓Occlusion
- DHydration
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The end product $(C)$ is


$A\xrightarrow[(ii)\;H_3O^+]{(i)\;CH_3MgBr}B\xrightarrow[573\;K]{Cu}2-$methyl $2-$butene
The mass percentage of carbon in $A$ is