Hello Anil

Focus on Physical and Organic....

Physical Chemistry first. So to tackle this,  you need to learn the basic theory behind it and then practice numericals. As you practice many numericals, your command over the chapter gets better. For chapters like electrochemistry, learn the equations too. For Solid State, learn all the crystal types and avoid silly mistakes. Dont go for rote learning. Try to understand the chapter.

For Inorganic Chemistry, I wouldn't say its total mugging up, but try to look for patterns. Practice maybe 5 equations every night before you go to sleep. That way, you'll be thorough with the equations during the exam.

Organic Chemistry - MECHANISMS are really important. Conversions can be aced only if you know the mechanisms behind it. Learn a few name reactions everyday. Again, when you break things down, you will find it easier to learn them. Do a little everyday.