Which of the following statement is correct regarding (p-V ) graph? 1. Slope of (p-V ) graph in an isothermal process is (- p V ). 2. Slope of (p-V ) graph in an adiabatic process is (- p V ). 3. Slope of (p-V ) graph in an isochoric process is (- p V ). 4. Slope of (p-V ) graph in an isobaric process is zero.

Step-by-step solution

(i) and (iv) options are correct. (i) Slope of (p-V ) graph in an isothermal process is (- p V ) this is correct. For isothermal process, slope of (p-V^ ) curve ( d p d V =- p V ) (ii) Slope of (p-V ) group in an adiabatic process is (- p V ), which is wrong. Because slope of (p-V ) graph in an adiabatic process is (- p V ). (iii) Slope of (p ) - (V ) graph in an isochoric process is (- p V ) this option is wrong. Because slope of (p-V ) graph for isochoric process is ( d p - d V V - d V V = d p 0 = ) (d) Slope of