JEE Main 2016 · 9 Apr · Shift 1 · Chemistry Q53

← JEE Main 2016 · 9 Apr · Shift 1

ChemistrySingle correct+4 / -1Question 53 of 90

5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is :

Ethane

Propane

Butane

Isobutane

Answer and worked solution

Official answer: B

$\ce{C_nH_{2n+2}}$ needs $\frac{3n+1}2$ volumes of $\ce{O2}$ ; $\frac{3n+1}2=5$ gives $n=3$ : propane.

Topics:Alkanes Stoichiometry

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JEE Main 2016 · 9 Apr · Shift 1, Chemistry question 53