MCQ
The heat change for the reaction ${H_2} + \frac{1}{2}{O_2} \to {H_2}O$ is called
- AHeat of reaction
- ✓Heat of formation
- CHeat of vaporisation
- DNone of the above
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(Given: Atomic mass of $\mathrm{C}=12, \mathrm{H}=1, \mathrm{O}=16 \mathrm{u}$ )
$(A)$ $CO _2, C _2 H _4, NO$ and $HCl$
$(B)$ $NO _2, O _3, HCl$ and $H _2 SO _4$
$(C)$ $BCl _3, NO , NO _2$ and $H _2 SO _4$
$(D)$ $CO _2, BCl _3, O _3$ and $C _2 H _4$