Dear shaswat

for iitb aerospace you ned to score more than 270 marks

except school and coaching hour you should give 4-5 hour in your home for IIT JEE Prepration.

Just stay calm and focus on understanding rather than mugging. Be regular in class and stay with concepts.Refer good books and always try to solve problems from magazines like MATHEMATICS, PHYSICS, CHEMISTRY TODAY atleast once in two months.

For BOOKS you can see  this link

http://www.askiitians.com/Important-books-iit-jee.aspx

For iit jeee there is no fixed weitage, it  vary from year to year...

But the important and soring topics are:

Maths:  calculus, Vectors, Complex numbers, co-ordinate geometry(2D+3D) Quadratic equations.

Physics: Optics, Modern physics, Thermodynamics, A/C circuits, Fluid mechanics, Experiments.

Chemistry: Solid state, chemica bonding, Aldehydes, ketones, carboxylic acids, Alkenes, alkynes, stereo and geometrical isomerism, transition elements, coordiantion compounds, electro chemistry, kinetics and equilibrium.

Hope you give your best.

Please feel free to post as many doubts on our discussion forum as you can. If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly.
 We are all IITians and here to help you in your IIT JEE preparation.

 All the best.
 
Regards,
Askiitians Experts
Badiuddin