There are three subjects like Physics, Chemistry, and Biology (life science) which comes in General Science. All these three subjects are very very important and scoring for all competitive examinations like SSC, RRB, JSSC, BSSC, PSU, IES, NTPC, BHEL, IOCL, etc.

Only Basic questions ask in any exams. You have to clear only concepts of Physics, Chemistry, and Biology to solve MCQ questions asked in these examinations. Here, This syllabus is a complete syllabus of General Science for all exams where you can trust. I also followed this syllabus to qualify the exam and never get any question from outside of this syllabus. 

We will provide you from basic to advanced MCQ (objective questions) with answers and explanation related to these three subjects. Because MCQ is asked in any exams. 
Frankly speaking, You cannot qualify any competitive exams without preparation of these three subjects. So, let's see each topic of general science MCQ one by one.

General Science Topic/Syllabus for SSC, RRB, PSU, JSSC

General science syllabus/topics

1. Biology

1.  Introduction
2. Classification of Organisms.
3. Cytology
4. Genetics
5. Structure of Plant and Animal Cell.
6. Classification of Plant Kingdom.
7. Plant Morphology
8. Plant tissue
9. Photosynthesis
10. Plant Hormones
11. Plant Diseases
12. Mode of Nutrition in Plant.
13. Control and Coordination in Plant
14. Sexual Reproduction in Flowering Plant.
15. Asexual Reproduction in Plants.

16. Transport system in Plant.
17. Respiration and Excretion in plants.
18. The Cell: The foundation of all living things.
19. Cell: Structure and Functions.
20. Control and Coordination in Human.
21. Human Reproductive system.
22. Excretory system in Humans.
23. Respiratory system in Humans.
24. Human Circulatory system.
25. The Heart.
26. Composition of Blood.
27. Functions of Blood.
28. Human Digestive system.
29. Cell Division
30. Food and Nutrition.
          Food & Nutrition MCQ-1: Carbohydrates
         Food & Nutrition MCQ-2: Proteins.
31. Human Diseases.
32. Nuclear fission and nuclear fusion
33. Classification of Animal Kingdom.
34. The five kingdoms of life.
35. Mode of Nutrition in Animal.
36. Nutrition in Animal.
37. Sexual Reproduction in Animal.
38. Respiration in Animals.
39. Miscellaneous.
RRB General Science Questions for ALP & Group d1RRB General Science Questions for ALP

2. Physics

1. Units & Dimensions
2. Motion
3. Work, Energy, and Power
4. Gravitation
5. Pressure
6. Floatation
7. Surface Tension
8. Viscosity
9. Elasticity
10. Simple Harmonic Motion
11. Wave
12. Sound Wave
13. Heat & Thermodynamics
14. Light
15. Static Electricity
16. Current Electricity.
17. Magnetism
18. Atomic and Nuclear Physics
19. Scientific Instruments.
20. Inventions
21. Radioactivity.
22. Nuclear fission and fusion
23. Electromagnetism
24. The four fundamental forces
25. The kinetic theory of matter
26. Magnetic effect of electric current
27. The Human eye and Defects.
First Among Indians MCQ with Key

3. Chemistry

1. Matter and its state
2. Atomic Structure
3. Chemical Bonding
4. Periodic Classification of Element.
5. Oxidation and Reduction
6. Acids, Base, and Salts
7. Behaviour of Gases
8. Electrolysis
9. Carbon and its Compound
10. Fuels
11. Metallurgy
12. Metals and Non-metals
13. Chemical Reactions
14. Radioactivity
15. Electrochemistry
16. Catalyst
17. Hydrocarbons
18. List of important Drugs and Chemicals
19. Fertilizers
20. Concepts of pH scale.

Final words:
I hope this article will help you to understand the General Science Topic /syllabus for all exams. This syllabus is a basic and very important for all exams. We will provide you MCQ for each topic to make easy our exams. because MCQ is easy to remember and good for practice. 
Biology is more important. From the recent analysis, questions are asked more from biology subject. Biology must be strong to crack any PSU exams.