As per me there is no official website but Rajasthan Pre-Medical Test (RPMT) is conducted every year by the Rajasthan University of Health Sciences for admission in various dental, medical and veterinary institutes in Rajasthan, so one can get max info form its official site :

RPMT Entrance Exam for following Courses admission
Bachelor of Medicine; Bachelor of Surgery (MBBS)
Bachelor of Dental Surgery (BDS)

Eligibility

For MBBS:
One must passed Senior Secondary examination or the Indian School Certificate Examination, which is equivalent to 10+2 after a period of 12 years study, the last 2 years of study must comprise of Physics, Chemistry, Biology / Biotechnology with English as compulsory subject.

For BDS:
One must passed Senior Secondary examination or theIndian School Certificate Examination, which is equivalent to 10+2 after a period of 12 years study, the last 2 years of study must comprise of Physics, Chemistry, Biology with English as compulsory subject.

RPMT Exam Pattern
The test comprises of 200 multiple choice objective type questions.
RPMT is divided into 2 tests:
Physics
Chemistry
The duration of exam will be of 2 hours for each paper.
Applicant 3 marks will be added for each right answer and 1 mark will be deducted for every wrong answer.
The distribution of subject and question is as follows:Section Subject No of Question Marks Time
A Physics 50 150 2 hours
B Chemistry 50 150 2 hours
Total 100 300 4 hours

RPMT Syllabus

Chemistry Syllabus
Chemical Equilibrium
Organic Chemistry
Periodic Properties of Elements
Structure of Atom
State of Matter
Chemistry of Elements and Compounds
Molecule and Chemical Bond

Physics Syllabus
Measurement
Optics
Physics of the Atom
Solids
Motion
Nuclear Physics
Thermodynamics
Wave Motion
Electricity
Kinetic Theory of Gases
Circular Motion
Electro-Magnetic Induction
Electronic Devices

Zoology Syllabus
Developmental Biology
Diversity of Animal Life
Histology
Ecology
Anatomy and Physiology
Genetics and Evolution
Reproductive System

Botany Syllabus
Man and Environment
Systematic
Anatomy and Physiology of Plants
Development Biology
Systems
Botany and Human Welfare
Cell Biology-Elementary