@ sourav
frst of all donot degrade your mind , everyone are facing such situation in class 12th . and that doesnot matter much .
its already too late , stiull i am assuming that u have some besic knowledge of class 11th .
what u can do in these remaining month is that focus on class 12th syllabus more , but from jee as well as board point of view .
that will help u to score more in board also , as u knw 75 percent is the minimum criteria for appearing jee main in 2017 .
in 12th below are the imp topics from mains point of view .
1- optics 2- semiconducter electronics (vvimp) generally shockleys equation .
3- moving charge and magnetism . 4- current electricity ( resister and kirchoff law )
5- alternating current ( lcr circuit )
CHEMISTRY
1- here i will suggest please do the reaction intermediate and nomenclature from 11th syllabus , they are vital for starting organic in 12th .
2- p block element 3- coordination compound ( vvimp )
4- solution 5- aldehyde , ketones and carboxylic acid .
6- if possible do the chemical bonding chapter from class 11th also .
MATHS
1- before starting 12th take a look at limit derivative and trigonometric function chapter of class 11th .
2- calculus part ( vvimp for mains and board )
3- probability ( bayes theoram ) 4- 3d geomtry
just now focus on these topics and also do the previous year jee papers which will give u the confidence for it .
and if possible alott some time in the wekends from just formula revision in class 11th syllabus .
specially mechanics , and organic chemistry part , and maths – conic section and straight lines .
just these thing u need to do from 11th .
and if u can manage these thing then mains will be cleared ,
but ADVANCED i cannot guarentee as it depends upon your hard work . advanced mainly ask combined concept ques which requires clear understanding of concepts .
AND LAST BUT NOT THE LEAST , DONOT TRY TO BE FALL IN SICK AGAIN , NOTHING CAN ADD AS BAD AS THAT .
IF U WILL PREPARE HARD AND WILL FALL SICK AT THE EXAM TIME ..
SO, TAKE GOOD CARE OF YOUR HEALTH
ALL THE BEST ..