MCQ
The compound ‘$A$’ having formula ${C_8}{H_{10}}$ (aromatic) which gives $1$ mononitro substitute and $3$ nitrosubstitute compound is
- A$m-$Xylene
- ✓$p-$Xylene
- C$o-$Xylene
- DEthyl benzene
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(Given) $\Delta H^o_f (CaCO_3,s) = -1207 \, \frac{kJ}{mol}$
$\Delta H^o_f \,(CaO,s) = -635 \,kJ/mol$
$\Delta H^o_f \,(CO_2.g) = -394 \,kJ/mol$
$2 Al + 3MnO \to Al_2O_3 + 3Mn$
Which of the following is correct? (Atomic weights of $Mn = 55$ and $Al = 27$)