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CBSE Class 11-science Answered

5 L of an alkane requires 25 L of oxygen for its complete combustion . If all volumes as measured at constant temperature an dpressure , the alkane is?

A-Butane

B-Isobutane

C-Propane

D-Ethane

Asked by Apoorva | 27 Apr, 2019, 05:20: PM
Expert Answer
Option C is correct.
 
The combustion reaction  of alkane is
 
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space space space space space space space space space space space space space At space constant space temperature space and space pressure

space space space space space space space space space space space space space Volume space proportional to space Number space of space moles

space space space space space space space space space space space space space straight n subscript alkane space space equals space open parentheses fraction numerator 2 over denominator 3 straight n plus 1 end fraction close parentheses cross times nO subscript 2

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As n = 3  os  is 3 carbon alkane, propane.
Answered by Varsha | 27 Apr, 2019, 06:18: PM
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