RAS Exam 2012 Syllabus: Rajasthan Public Service Commission(RPSC), Ajmer has issued Notification for RAS Exam 2012 for Rajasthan State and Subordinate Services Combined Competitive Examination.
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http://rpsc.rajasthan.gov.in/Syllabus.aspx
RAS PRE/ Mains Syllabus:
RAS PRE will have Two Papers.
PAPER 1 GENERAL KNOWLEDGE(Compulsory): GK has no limit of Syallabus, so no one can define the range of syllabus but it contains 50% waitage to Rajasthan GK and 50% to India/World General knowledge including general Science.
General Knowledge. 
PAPER 2: OPTIONAL SUBJECT: RAS Pre will have Second paper as one of Optional Subject listed below with Syllabus.
RAS MAINS: RAS main will have TWO optional Paper from below list as per RPSC Guidelines to select Subject.The Syllabus for the Paper/ Subjects prescribed for Examinations are mentioned here in accordance with Subject will is listed here:

01. Agriculture Syllabus for RAS Exam
02. Agricultural Engineering Syllabus for RAS Exam
03. Animal Husbandry & Veterinary Science Syllabus for RAS Exam
04. Botany Syllabus for RAS Exam
05. Chemistry Syllabus for RAS Exam
06. Civil Engineering Syllabus for RAS Exam
07. Commerce and Accountancy Syllabus for RAS Exam
08. Crop Husbandry with Horticulture Syllabus for RAS Exam
09. Computer Engineering Syllabus for RAS Exam
10. Computer Science Syllabus for RAS Exam
11. Dairy Processing & Technology Syllabus for RAS Exam
12. Economics Syllabus for RAS Exam
13. Electrical Engineering Syllabus for RAS Exam
14. Electronics & Telecommunication Engineering Syllabus for RAS Exam
15. Geography Syllabus for RAS Exam
16. Geology Syllabus for RAS Exam
17. Home Science Syllabus for RAS Exam
18. History Syllabus for RAS Exam
19. Law Syllabus for RAS Exam
20. Mathematics Syllabus for RAS Exam
21. Mechanical Engineering Syllabus for RAS Exam
22. Mining Engineering Syllabus for RAS Exam
23. Philosophy Syllabus for RAS Exam
24. Physics Syllabus for RAS Exam
25. Political Science & International Relations Syllabus for RAS Exam
26. Psychology Syllabus for RAS Exam
27. Public Administration Syllabus for RAS Exam
28. Sociology Syllabus for RAS Exam
29. Statistics Syllabus for RAS Exam
30. Zoology Syllabus for RAS Exam
31. Anthropology Syllabus for RAS Exam
32. Management Syllabus for RAS Exam
Literature Subjects:

33. English Syllabus for RAS Exam
34. Hindi Syllabus for RAS Exam
35. Urdu    Syllabus for RAS Exam
36. Sanskrit Syllabus for RAS Exam
37. Sindhi Syllabus for RAS Exam