All combustion reactions are………………. .

The enthalpy change of combustion reaction are always …………..

This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement-I : All combustion reactions are exothermic. Statement-II : Enthalpies of products are greater than enthalpies of reactants (sumV_PDelta_fH(P) gt sum V_RDelta_f H(R))

Which of the following is combustion reactions ?

Assertion(A) : For the combustion reactions, the value of DeltaH is always negative. Reason(R ) : The combustion reactions are always endothermic.

Asseration: Combustion reactions are also called as an exothermic oxidation reaction. Reasons In these reactions ,oxygen is added and heat energy is released.