The general form of potential energy curve for atoms or molecules can be represented by the following equation . Here, is the interatomic or molecular distance, and are coefficients, and are the exponents. In the above equation 

a) 
First term represents the attractive part of the potential 
b) 
Second term represents the attractive part of the potential 
c) 
Both terms represents the attractive part of the potential 
d) 
Second term represents the repulsive part of the potential 
The general form of potential energy curve for atoms or molecules can be represented by the following equation . Here, is the interatomic or molecular distance, and are coefficients, and are the exponents. In the above equation 

a) 
First term represents the attractive part of the potential 
b) 
Second term represents the attractive part of the potential 
c) 
Both terms represents the attractive part of the potential 
d) 
Second term represents the repulsive part of the potential 
(b) The negative potential energy ( part) is the attractive 