Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedHard2 minPYQ_2014

ChemistryHardsingle choice

$1.0 g$ of magnesium is burnt with $0.56 g$ $O_{2}$ in a closed vessel. Which reaction is left in excess and how much? (At, wt. $M g = 24; O = 16)$ NEET 2014

Options:

Answer:

Solution:

$M g + \frac{1}{2} O_{2} \to M g O$
$\frac{1.0}{24} \frac{0.56}{32}$
$\frac{0.5}{12} \frac{0.07}{4}$
Oxygen is limiting reagent so $\frac{0.07}{4} - \frac{x}{2} = 0$
$x = \frac{0.07}{2}$
excess $M g = \frac{0.5}{12} - \frac{0.07}{2}$ mole
mass of $M g$ is $= 1 - 0.7 \times 12 = 0.16 g r a m .$

Stream:NEETSubject:ChemistryTopic:Mole ConceptSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2014

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