Hello Deepanshu,

 first of all, let us discuss the syllabus for the exam

Measurement, Motion in one dimension, Work, Power and Energy, Linear Momentum & Collisions, Rotation of a Rigid Body About a Fixed Axis, Mechanics of Solids and Fluids, Heat and Thermodynamics, Laws of Motion, Motion in two dimensions, Wave, Electrostatics, Current Electricity, Magnetic Effect of Current, Magnetism in Matter, Ray Optics and Optical Instruments, Gravitation, Oscillatory Motion, Electromagnetic Induction, Wave Optics and Modern Physics.

Atomic Structure, Chemical Bonding, Acid-Base Concepts, Colloids, Colligative Properties of Solution, Isomerism, IUPAC, Polymers, Redox Reactions, Electrochemistry, Catalysis, Chemical Equilibrium and Kinetics, Periodic Table, Thermochemistry, General Organic Chemistry, Carbohydrates, Solid State, Petroleum.

Algebra, Co-ordinate Geometry, Calculus, Probability, Trigonometry, Vectors, Dynamics & Statics.

now coming to preparation:

UPSEE is not as tough as that of the Mains level

for chemistry you can rely on the NCERT as it has enough knowledge needed for the exam.You can also make the reaction mechanism chart and then constantly revise them.Solve the previous year question papers as well as the questions tend to repeat.

for physics and maths, just try to solve the questions in the given time as all the questions are not tough, but requires fast speed to solve.

hope it helps.

Thankyou