Question

important chapters of class XI (pcm) which are going to help us in XII

Answer 1

physics...
wave and oscillation
maths....
3- D
limits and derivative
probability
linear in-equality
straight line
binomial and pmi
chemistry....
p block
chemical bonding
iupsc names
and some basic concept

Answer 2

Chemistry :

Chemical BondingEquilibriumBasic Concepts of Organic ChemistryHydrocarbons

Physics :

Units and VectorsNewton's Laws of Motion.Work Energy PowerRotational DynamicsWaves and SHM

Mathematics :

Relations and Functions Limits, continuity and differentiability Trigonometry   Coordinate Geometry Permutation and Combination BinomialTheorem Probability