Syllabus for BITSAT:-

Physics:

• Units and Measurements
• Kinematics
• Newton’s Laws of Motion
• Impulse and Momentum
• Work and Energy
• Rotational Motion
• Gravitation
• Mechanics of Solids and Fluids
• Oscillations
• Waves
• Heat and Thermodynamics
• Electrostatics
• Current Electricity
• Magnetic Effect of Current
• Electromagnetic Induction
• Optics
• Modern Physics
• Electronic Devices

Chemistry:

• States of Matter
• Atomic Structure
• Chemical Bonding & Molecular Structure
• Thermodynamics
• Physical and Chemical Equilibrium
• Electrochemistry
• Chemical Kinetics
• Hydrogen and s-block elements
• Principles of Organic Chemistry
• Hydrocarbons
• Stereochemistry
• Organic Compounds with functional groups containing oxygen and Nitrogen
• Theoretical principles of experimental chemistry
• Biological Chemistry
• Industrial Chemistry
• Environmental Chemistry

Maths:

• Complex numbers
• Theory of Quadratic Equations
• Arithmetic
• Geometric and harmonic progressions
• Logarithms and their properties
• Exponential Series
• Permutations and Combinations
• Binomial Theorem
• Pascal’s Triangle
• Circles
• Straight Lines & Pair of Straight Lines
• Sets, Relations and Functions
• Matrices Determinants
• Heights & Distances
• Trigonometry
• Three-Dimensional geometry
• Limits, Continuity and Differentiability
• Application of Derivatives
• Definite and Indefinite Integration
• Area Under Curves
• Ordinary Differential Equations
• Probability
• Vectors
• Statistics
• Linear Programming

All the very best and good luck.

Dear Ayush,

According, to the coaching institutes based on previous year you can check the important topics for BITSAT below

Physics

Heat & Thermodynamics 

Magnetic effect of current & magnetism 

Wave Motion

Current Electricity 

Electrostatics

Simple Harmonic Motion

Wave Optics

Fluids 

Chemistry

Chemical Bonding 

Biomolecules

Carboxylic Acid & its derivates

Atomic Structure

p-block elements

Mole Concepts

Alkanes, Alkenes & Alkynes

Electrochemistry

Chemical Thermodynamics

Mathematics

Circles

Straight lines

Pair of straight lines 

Vectors

Continuity & Differentiability

Good Luck!!