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Please solve this question. I really want to know what is the answer of this question. Please help.

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    $\begingroup$ "Nickle", eh? :D $\endgroup$ – paracetamol Sep 14 '17 at 11:24
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    $\begingroup$ @paracetamol Looks like Nickie to me, must be some girl in the lab... $\endgroup$ – andselisk Sep 14 '17 at 11:35
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    $\begingroup$ We are not here to do your homework. $\endgroup$ – Nilay Ghosh Sep 14 '17 at 12:56
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    $\begingroup$ I wonder what they mean with $\ce{C{0}_2}$ and $\ce{H2{0}}$ $\endgroup$ – Jan Sep 15 '17 at 9:28
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Second sentence just says us that 1 mole of C contains 2 moles of carbon atoms and 6 moles of H atoms, and we don't really know whether O is present. Thus the formula of C is C2H6Ox.
Though reaction of B with hydrogen in presence of Ni forming C gives a clue that B was an alkene or alkyne, and C is an alkane, and C has no oxygens.
Moreover, alcohols are known to give up water in presence of sulfuric acid to form alkenes.
In this case, C is ethane C2H6, B is ethene C2H4 and A is ethyl alcohol C2H5OH.

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    $\begingroup$ Avoid answering homework type question. $\endgroup$ – Nilay Ghosh Sep 14 '17 at 12:57

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