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Physics, Chemistry, Biology, C.S --> Hardest Questions Compiled

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I am compiling the hardest / trickiest questions for the following subs:
Physics
Chemistry
Biology
Computer Studies

NOTE: These questions may be easy for some of you, so please don't criticize. There might be even harder questions. In the latter case, do post snapshots of the questions.

CHEMISTRY MCQs here
BIO MCQs [UPDATED]

ENJOY

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  • Chemistry MCQs.zip
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  • Biology .zip
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Last edited:
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More bio:
 

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The mosquito questions in Biology is the most confusing thing I find. I mean they are weird. Is there anybody who gets them right every time? Would he like to explain, how?
 
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Awesome12 Kindly crop the answer part. You've already marked the answers and I feel I'm just copying you so please do it if you can. :p
 
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More Bio:
 

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Even more Bio:
 

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Messages
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Bio finally ends

And peeps don't forget to vote ;)
 

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Computer Studies now:
 

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Even more C.S:
 

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Computer Studies just does not finish that easily:
 

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Messages
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Finally it ends:
 

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