MCQ
Which of the following statements is correct for covalent bond
- AElectrons are shared between two atoms
- BIt may be polar or non-polar
- CDirection is non-polar
- ✓$(a)$ and $(b)$
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$Ba{\left( {{N_3}} \right)_2}\xrightarrow{\Delta }Ba + {N_2} \uparrow $

$CH _{3} OH (1)+\frac{3}{2} O _{2}( g ) \rightarrow CO _{2}( g )+2 H _{2} O (1)$
the amount of heat produced as measured by bomb calorimeter is $726 \,kJ\, mol ^{-1}$ at $27^{\circ} C$. The enthalpy of combustion for the reaction is $- x \,kJ\,mol ^{-1}$, where $x$ is $.....$ (Nearest integer)
$\left(\right.$ Given $: R =8.3\, J\,K ^{-1} \,mol ^{-1}$ )