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  • When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the molecular formula of A ?  <div class='qna

When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the molecular formula of A ?

 

Option: 1

\mathrm{C_{5}H_{8}}


Option: 2

\mathrm{C_{11}H_{4}}


Option: 3

\mathrm{C_{9}H_{8}}


Option: 4

\mathrm{C_{11}H_{8}}


Answers (1)

best_answer

\mathrm{C}_{\mathrm{x}} \mathrm{H}_{\mathrm{y}}+\left(\mathrm{x}+\frac{\mathrm{y}}{4}\right) \mathrm{O}_2 \rightarrow \mathrm{xCO}_2+\frac{\mathrm{y}}{2} \mathrm{H}_2 \mathrm{O}

x+\frac{y}{4}=11 \: \: \: \: \: \: \: \: \: \: \: \:\: \: \: \: \: \: \: \: \: \: \: \quad \frac{y}{2}=4

\mathrm{X=9}                                         \mathrm{X=8(C_{9}H_{8})}

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Riya

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