Hello Akanksha

It is possible to complete the syllabus within 4 months with discipline and clear plan. You need to be consistent everyday.

•In the first month you can complete

Units & measurement, motion in 1d and 2d, laws of motion, work power energy

Some basic concepts of chemistry, atomic structure, periodic table, Chemical bonding

Living world, biological classification,plant kingdom, animal kingdom

•2 month

Centre of mass, rotational motion, gravitation mechanical properties of solid and fluid

Thermodynamics, equilibrium,redix reaction, hydrogen

Anatomy of flowering plants, cell structure and function,cell cycle

•3 month

Thermodynamics, kinetic theory, oscillation and waves

S block,p block,organic chemistry, hydrocarbons

Photosynthesis, respiration,plant growth and development, digestion and absorption

•In the 4th month you can revise all the chapters

You can follow this method or do 2-3 easy chapters with 2-3 difficult chapters

You need to study for atleast 9hrs to complete your syllabus

Don't forget to give mocks.

All the best for your preparation and exam