Question

10th main topics in all subjects

Answer 1

from examination point of view in maths
1 polynomial
2 trigonometry
3 construction
4 surface area and volume
5 area related to circle

for science
1 periodic classification of elements
2 heredity and evolution
3 electricity
4 source of energy and human eye
5 chemical reaction
6 control and coordination

Answer 2

for math:
there is max. weightage for sa and volume
secondly for quadratic equation and geometry.if you get full in this u will get 60 marks.

english :
all chapters are equal only.except for julius ceasar and shady plot are little important .

social:
nationalism in india is veryyyyyyy important.compared to nationalism in europe.

science:
chem:
carbon and its compound is very important. ester formation,ethanol and ethanoic acid reactions.
periodic clas:the increase and decreasing topics are important.try to memorize till 20 elements tleast

bio:
heredity and evolution :crosses are important.mendels experiments important.
and  reproduction:all diagrams are very important.
other two chaps are not that important.it is based upon you general knowledge only.

physics:eyes defect, corresponding ray diagrams, sums based on power of lens, refraction throuh prism.why does sun appear red ,and tyndall effect.
reflection and refraction: all ray diagrams and the boxes given are only like infinite important.you will score 20 if u study that alone itself.

hope it helps!!!!