JEE Main 2025 — Some Basic Concepts of Chemistry Question with Solution
JEE Main 2025 (23 Jan Shift 2)
Question
When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxide produced in grams is_______ - (Nearest integer)
Given :
Molar mass of Al is
Molar mass of O is
Enter your answer
Show full solutionCorrect answer: 153
Correct answer
153
Step-by-step explanation
Limiting reagent
$\begin{aligned}
& \therefore \text { mole of } \mathrm{Al}_2 \mathrm{O}_3 \text { formed }=\frac{1}{2} \times 3 \text { mole } \\
& \therefore \text { wt. of } \mathrm{Al}_2 \mathrm{O}_3 \text { formed }=\frac{3}{2} \times 102 \\
& \quad=153 \mathrm{gm}
\end{aligned}$
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