Class 12 Economics Chapter 2 Theory of Consumer Behaviour PDF NCERT Solutions for Class 12 Economics. Chapter 2 Theory of Consumer Behaviour. PDF Download Free. PDF Download Free Chapter 1 Introduction Chapter 2 Theory of Consumer Behaviour Chapter 3 Production and Costs Chapter 4 The Theory of The Firm Chapter 5 Market Equilibrium Chapter 6 Non-Competitive Markets NCERT Solutions for Class 12