Sir, Tell me that how much minimum marks required in each subjects (physics, chemistryand mathematics) for applying in jee main entrance exam for general candidate.

There is no percentage barrier to be eligible for Jee Main. You just need to qualify the exam with PCM and English as main subject to be eligible for Jee Main. However, for admission to IITs, NITs, IIITs, CFTIs boards marks are taken into consideration. For these institutes, you should have secured 75% marks or must be in top 20 percentile of your board. 5 subjects considered for calculating this top 20 percentile criteria- Physics, Chemistry, Mathematics, Language (the one with highest score) and any subject other than the above four (the one with highest score). Check it here http://engineering.careers360.com/articles/jee-main-eligibility-criteria