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Biology; Chemistry; Physics: Post your doubts here!

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Nothing :p
Sure if that's what keeps you happy :) Actually, i think that would be the best answer you can get :p

Next one:
What are the 3 different types of carbon allotropes?
Only 2 are in syllabus that are graphite and diamond
 
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Diamond, graphite and Lonsdaleite (third one is not in the syllabus, only first two are mentioned)
Nice googling skills :p jk

actually there are 4 :) Bucky ball, Graphite, Diamond and Lonsdaleite.

Next up: (let's see whose the genius here)

Al2O3 is amphoteric. Yet it covers and stops Aluminium from reacting with acidic food or drinks. What's your explanation?
 
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Aluminium has an oxide layer over it which prevents it from reacting :p
Nice googling skills :p jk

actually there are 4 :) Bucky ball, Graphite, Diamond and Lonsdaleite.

Next up: (let's see whose the genius here)

Al2O3 is amphoteric. Yet it covers and stops Aluminium from reacting with acidic food or drinks. What's your explanation?
 
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