what is 8085 Microprocessor ?

 It has basic features of microprocessors with internal ROM, RAM, input output ports inbuilt on a single chip. Microcontroller is a device in which entire computer manufactured on a single chip.

Different sizes of Microprocessor ?

Microcontroller has 3 basic sizes: Standard, short, extended Sort and extended chips are available in DIP (dual-in-line package), but extended 8051 models have differ form factor, and are not drop in compatible. History of 8051 In 1981, intel corporation introduced an 8 bit microcontroller called 8051.