Question

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Answer 1

option 1

unbranched alkane is has better heat of combustion

pehle toh no. of carbon dekh.jiske jyada carbon uske jyada heat of combustion..agar sbke same hai toh branching dekh jiske ....kum branching uski heat of combustion jyada

extra info

heat of hydrogenation me total alpha H count kr jiske alpha h jyada voi jyada heat of hydrogenation

and agar alpha h same toh fir unstable dekh.jo jitna unstable utna jyada heat of hydrogenation kyuki fir voi jaldi react krega heat dene pe and stable banega toh jyada heat of hydrogenation hogi

caution ..pehle carbon no. check krna h.o.c me and then branching agar carbon jyada hai toh voi hi jeetega bhali usme branching jyada hoi.

caution...pehle no. of alpha h count krna h.o.h me agar apha h jyada hai and bhali kitna bhi stable hoi toh bhi voi hi jeetega

so pehel first criterio check kiya kr dono me agar voi same hoi toh hi sirf toh hi second pe jana

h.o.h means heat of hydrogenation and h.o.c means combustion