MCQ
$A\underset{\Delta }{\mathop{\xleftarrow{Cu}}}\,C{{H}_{3}}C{{H}_{2}}OH\underset{\Delta }{\mathop{\xrightarrow{A{{l}_{2}}{{O}_{3}}}}}\,B.$ $A$ and $B$ respectively are
- AAlkene, alkanal
- BAlkyne, alkanal
- ✓Alkanal, alkene
- DAlkene, alkyne
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Given : $\Delta H _{ f }^{\ominus}\left( Al _2 O _3\right)=-1700\,kJ\,mol ^{-1}$
$\Delta H _{ f }^\theta\left( Fe _2 O _3\right)=-840\,kJ\,mol ^{-1}$
Molar mass of $Fe , Al$ and $O$ are $56,27$ and $16\,g\,mol ^{-1}$ respectively.