JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
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 \(A\) ?
- A \(C _9 H _8\)
- B \(C _{11} H _4\)
- C \(C _5 H _8\)
- D \(C _{11} H _8\)
Answer & Solution
Correct Answer
(A) \(C _9 H _8\)
Step-by-step Solution
Detailed explanation
\(C _{ x } H _{ y }+\left( x +\frac{ y }{4}\right) O _2 \rightarrow xCO _2+\frac{ y }{2} H _2 O\) \(\frac{ y }{2}=4 \therefore y =8\) \(x +\frac{8}{4}=11\) \(\therefore x =9\) \(\therefore \text { Hydrocarbon will be }= C _9 H _8\)
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