Statement 1: Heat of combustion are always exothermic. Statement 2: Combustion of N 2 to give NO is exothermic.

Question

Statement 1: Heat of combustion are always exothermic. Statement 2: Combustion of N 2 to give NO is exothermic. (A) Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1 (B) Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1 (C) Statement 1 is True, Statement 2 is False (D) Statement 1 is False, Statement 2 is True

Tardigrade Admin · Accepted Answer

1 / 2 N 2+1 / 2 O 2 arrow NO ; Δ H=+ ve. It is due to high bond energy of N2. Note this equation does not represent heat of combustion of N 2 (partial combustion).

Q. Statement 1: Heat of combustion are always exothermic.
Statement 2: Combustion of $N_{2}$ to give $NO$ is exothermic.

Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1

Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1

Statement 1 is True, Statement 2 is False

Statement 1 is False, Statement 2 is True

$1/2 N_{2} + 1/2 O_{2} \to NO; Δ H = +$ ve. It is due to high bond energy of $N_{2}$ . Note this equation does not represent heat of combustion of $N_{2}$ (partial combustion).

Q. Statement 1: Heat of combustion are always exothermic. Statement 2: Combustion of N2​ to give NO is exothermic.