Hey Ankita !
Well, to be true, 1 week's time is quite enough to let you prepare well for these chapters.
Follow this routine.
On 1st day, complete 1 chapter from each subject.
On 2nd day, again complete 1 chapter for each subject.
Doing this, within 3 days, your base would be clear.
On the 4th,5th and 6th day, give mock tests upon these chapters on a time bound manner.
Thus, you are done with the basic concepts and the practice of chapters.
On the final day, just give a glimpse on all the chapters.
Don't study heavily, try to stay calm and take some rest.
And then, keep your patience to give the exam.

Hope this helps.

Good Luck !

Hello dear,
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What ever the subject may be,learn how to make a flow of learning.
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Firstly never go for a subject more then an hours.Give some time to brain to relax.You can read but it will not be memorable for longer them.
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So either change the subject or give some relaxation to Brain.
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Next make sure that you will not be stucked with a topic for longer time.if you aren't understanding keep it aside and for another.
In this way u will be gathering few doubts which u can solve it later.
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Next change the style,it means if you are reading today,,,tomorrow go for practicals.
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Last but not least quiz your self,means if you get a doubt clear it in 2 to 3 ways by questioning yourself.
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This will surely help you out in your lifetime education.
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Thank you.