Q.
An organic compound containing C, H and O has 49.3% A carbon , 6.84% hydrogen and its vapour density is 73. Molecular formula of the compound is
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a
C3H5O2
b
C4H10O2
c
C6H10O4
d
C3H10O2
answer is C.
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Detailed Solution
The empirical formula is C3H5O2. Empirical formula weight = 3 x 12+ 5 x 1+ 2x 16 = 36+5+32=73Molecular weight of the compound = 2x VD = 2x 73 = 146n= mol. wt. empirical formula wt. =14673=2Molecular formula = Empirical formula x 2 = (C3H5O2) ×2=C6H10O4
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