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Which of the following alkanes has 75% of carbon?

$(a)\;C_2H_6\qquad(b)\;CH_4\qquad(c)\;C_3H_8\qquad(d)\;C_4H_{10}$
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Percentage of carbon in methane =$\large\frac{12}{16}$$\times 100$
$\qquad\qquad\qquad\qquad\qquad\quad\;\;$=75%
Hence (b) is the correct option.
answered Oct 22, 2013 by sreemathi.v
 

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