MCQ
n-butane and isobutane are :
- ✓chain isomers
- Bposition isomers
- Cmetamers
- Dtautomers
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${N_2}{O_3}\xrightarrow{{R.T.}}NO + N{O_2}$


$H _{2}+\frac{1}{2} O _{2} \rightarrow H _{2} O , \cdots \cdots( ii )$ $\Delta H =-\,287.3 \,kJ\,mol ^{-1}$
$2 CO _{2}+3 H _{2} O \rightarrow C _{2} H _{5} OH +3 O _{2} \cdots \cdots ( iii )$; $ \Delta H =1366.8 \,kJ\,mol ^{-1}$
Find the standard enthalpy of formation of $C _{2} H _{5} OH (1)$