हाइड्रोजन \( \left(\mathrm{H}_{2}\right) \), साइक्लोहेक्सीन \( \left(\mathrm{C}_{6} \mathrm{H}_{...
हाइड्रोजन \( \left(\mathrm{H}_{2}\right) \), साइक्लोहेक्सीन \( \left(\mathrm{C}_{6} \mathrm{H}_{10}\right) \) तथा साइक्लोहेक्सेन \( \left(\mathrm{C}_{6} \mathrm{H}_{12}\right) \) की दहन एन्थैल्पी क्रमश: \( -241,-3800 \) और \( -3920 \) है। साइक्लोहेक्सीन की हाइड्रोजनीकरण ऊष्मा है
(A) \( -121 \) किलोजूल / मोल
(B) \( +121 \) किलोजल / मोल
(C) \( +242 \) किलोजूल / मोल
(D) \( -242 \) किलोजूल / मोल
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