Question

If an alkene is defined by the formulae CxHy then, the value of y is:
(A) y = 2x
(B) y = x-2
(C) y = 2x - 2
(D) y = x
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Answer 1

here is your answer mate....

Formula for Alkene is CnH2n

then...

it means 2X = y

HOPe it helps you....