JEE MAIN - Chemistry Hindi (2025 - 29th January Evening Shift - No. 15)
यदि $\quad C$ (हीरा $) \rightarrow C$ (ग्रेफाइट) $+X \mathrm{~kJ} \mathrm{~mol}^{-1}$
C (हीरा) $+\mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})+\mathrm{Y} \mathrm{kJ} \mathrm{mol}{ }^{-1}$
C (ग्रेफाइट) $+\mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g})+\mathrm{Z} \mathrm{kJ} \mathrm{mol}^{-1}$
नियत तापमान पर। तब
−X = Y + Z
X = Y − Z
X = −Y + Z
X = Y + Z
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