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NEET 2009
Exam
NEET
Year
2009
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

NEET 2009 · Chemistry · Some Basic Concepts of Chemistry

10 ~g of hydrogen and 64 of oxygen were filled in a steel vessel...

10 g10 \mathrm{~g} of hydrogen and 64 of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be

Options

  1. A2 mol2 \mathrm{~mol}
  2. B3 mol3 \mathrm{~mol}
  3. C4 mol4 \mathrm{~mol}
  4. D1 mol1 \mathrm{~mol}

Correct answer

C. 4 mol4 \mathrm{~mol}

Step-by-step solution

Key Idea (i) H2+12O2⟶H2O(ii)Amount\mathrm{H}_2+\frac{1}{2} \mathrm{O}_2 \longrightarrow \mathrm{H}_2 \mathrm{O} (ii) Amount of waterproducedisdecidedbylimitedreactant(ie,thereactantwhichisusedinsmallamount)water produced is decided by limited reactant (ie, the reactant which is used in small amount)H2+12O2⟶H2O1mol12mol1mol102mol6432mol=5mol=2mol∵12molO2 gives =1molH2O∴2molO2 will give =1×2×2=4mol.\begin{aligned} & \mathrm{H}_2+\frac{1}{2} \mathrm{O}_2 \longrightarrow \mathrm{H}_2 \mathrm{O} \\ & 1 \mathrm{ mol} \quad \frac{1}{2} \mathrm{ mol} \quad 1 \mathrm{ mol} \\ & \frac{10}{2} \mathrm{ mol} \quad \frac{64}{32} \mathrm{ mol} \\ & =5 \mathrm{ mol}=2 \mathrm{ mol} \\ & \because \frac{1}{2} \mathrm{molO}_2 \text{ gives }=1 \mathrm{ mol} \mathrm{H}_2 \mathrm{O} \\ & \therefore 2 \mathrm{ mol} \mathrm{O}_2 \text{ will give }=1 \times 2 \times 2=4 \mathrm{ mol} . \end{aligned}$$
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