Biology; Chemistry; Physics: Post your doubts here!

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Can someone tell me what is the merit at gcu Lahore for fsc for those candidates who have done o level.what was it this year
 
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In A, B, D reactions.. the product formed will be different isomers. When the double bond converts into single bond, the OH and H can attach in two different ways. In A, they have shown one way of attaching H and OH. But there will also be another way, if you swap the OH and H. That gives another isomer. So Reaction A will have two products, both isomers of each other.

C is the only reaction that doesn't give isomers, and only gives one product, because the Alkene in C is symmetrical, and no matter to which Carbon you attach the OH, it will be the same thing.
 
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when the positive charged rod is brought close, all the negative charges from both spheres (as the are in contact) become attracted to the rod (the left side of the sphere) leaving the positive charges on the far right side.
Thus when the sphere L is moved away then only negative charges remain on the the sphere which the spread evenly after the positive rod is moved.Capture.PNG
 
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when the positive charged rod is brought close, all the negative charges from both spheres (as the are in contact) become attracted to the rod (the left side of the sphere) leaving the positive charges on the far right side.
Thus when the sphere L is moved away then only negative charges remain on the the sphere which the spread evenly after the positive rod is moved.View attachment 64628
Thanks a lot sis
 
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Hello, i have my paper 6 biology cie exameon thursday and dont know which parts to revise + I want to get an A* any tips
Or help. Thanks alot.
 
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