This is are fixed subject or any changes will happen

Hello Akkramani,

Chemical engineering is a highly sought  out course by many engineering aspirants.The course deals with the design and development of processes and operation of machines and plants through which the physical and chemical state of materials undergo various changes.

To qualify gate exam for chemical engineering you must thorough with the entire core subjects which can help you to prepare well. The core subjects are as follows:

1.Engineering Mathematics

• Calculus
• Complex Variables
• Differential Equations
• Linear Algebra
• Numerical Methods
• Probability and Statistics

2.Process Calculations and Thermodynamics

• State mass
• Energy Balance
• Thermodynamics
• Open systems

3.Fluid Mechanics and mechanical operations

4.Heat transfer

5.Mass transfer

6.Chemical Reactin engineering 

7.Chemical Technology

To prepare for the same ,candidate should solve sample paper and mock tests frequently.Candidate should create a small notebok to write difficult theories and concepts from the syllabus will help to revise the topics easily and frequently.

Adding on to this  , I'm also giving you the information about the last year cut off for the different categories:

• General - 44.30
• OBC - 39.80
• SC/ST/PD - 29.50

The candidates are also advised to study for the General Aptitude,English and Mathematics section.THe difficulty level for those would not be very high but it is still recommended that almost equal preparation sholud be done.

All the best!