Answer:   CLASS:
Class is the definition of an object
It is a template of the object
It describes all the methods, properties, etc
OBJECT:
An object is an instance of a class.
A class does not become an object unless instantiated
An object is used to access all those properties from the class.

Answer:   1) Object is an instance of a class whereas Class is a blueprint or template from which objects are created.
2) Object is a real world entity such as pen, laptop, mobile, bed, keyboard, mouse, chair etc. whereas Class is a group of similar objects.
3) Object is a physical entity whereas Class is a logical entity.
4) Object is created through new keyword mainly e.g. Student s1=new Student(); whereas Class is declared using class keyword e.g. class Student{}
5) Object is created many times as per requirement whereas Class is declared once.
6) Object allocates memory when it is created whereas Class doesn't allocated memory when it is created.