dear rajat,

as u are currently in 10 th class concentrate on ur current topics. i appreciate u for ur passion for iit. you hav enough time when u come to 11. my advice is to try seriously for iit from 11 its the best. if u still dont want to waste the time u can read the books and solve problems in the books like cengage, resnick and halliday, atkins physical chemistry, arihant by sk goyal etc which needs more then 2 yrs to solve