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1990 WAEC Chemistry Theory  A hydrocarbon X which decolorizes bromine water but has no action on ammoniacal silver trioxonitrate...

Chemistry
WAEC 1990

 A hydrocarbon X which decolorizes bromine water but has no action on ammoniacal silver trioxonitrate (V) solution was found to have a molar mass of 58 g mol\(^{-1}\)

(a) Deduce the molecular formula of X. (H = 1, C = 12)

(b) Write the structures of two isomers of X.

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Explanation

(a) The test carried out shows the hydrocarbon x is an alkene. The smallest number of the family is ethene (C\(_2H_4\))

If (\(C+2H_4)_x = 56\)

i.e. (28)x = 56

x = \(\frac{56}{28}\) = 2

2(\(C_2H_4\)) = C\(_4\)H\(_8\)

 

(b)

 

 

 


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