Question

The thermal decomposition of nitrogen pentaoxide in the gaseous phase is the example of ___________

(a) Zero order reaction

(b) Half order reaction

(c) First order reaction

(d) Second order reaction

I got this question in class test.

Question is taken from Integrated Rate Equation and Half Lives topic in portion Reaction Dynamics of Engineering Chemistry I

Answer 1

The correct option is (c) First order reaction

To elaborate: The thermal decomposition of nitrogen pentaoxide in the gaseous phase is the example of first order reaction. A first order reaction depends on the concentration of only one reactant (a unimolecular reaction).