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Biology; Chemistry; Physics: Post your doubts here!

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If question says aqueous it means concentrated,otherwise in such questions about halogen migrations it would mention dilute.
that is really stupid of CIE, yah rasam o ravaj unn k hamein kis tarah pta?
likhtay waqt kia masla tha unhain, baad main er kahtee hai most of them wrote oxygen bubbling

What other things are like this?
 
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See the empirical formula is the simplest ration in which atoms combine
So lets consider option A

Butanoic acid has a formula C4H8O2

If we simplify this, we will get
C2H4O

So A is the answer
dividing it by 2? always?
 
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