Which of the following statements is true regarding the reaction given below?

\(2 \mathrm{Al}_{(\mathrm{s})}+6 \mathrm{HCl}_{(\mathrm{aq})} \rightarrow 2 \mathrm{Al}^{3+}{ }_{(\mathrm{aq})}+6 \mathrm{Cl}^{-}(\mathrm{aq})+3 \mathrm{H}_2(\mathrm{~g})\)

1. 6L HCl(aq) is consumed for every 3L of H2(g) produced.
2. 33.6 L H2(g) is produced regardless of temperature and pressure for every mole of Al that reacts.
3. 67.2 L H2(g) at STP is produced for every mole of Al that reacts.
4. 11.2 L H2(g) at STP is produced for every mole of HCl(aq) consumed.
Subtopic:  Limiting Reagent |
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250 mL of \(0.5~\text{M NaOH}\) was added to 500 mL of 1 M HCl. The number of unreacted HCl molecules in the solution after complete reaction is
\(x\times10^{21}.\) Find the value of x (Nearest integer).
\(\left(\mathrm{N}_{\mathrm{A}}=6.022 \times 10^{23}\right)\)
1. 256
2. 465
3. 226
4. 145
Subtopic:  Limiting Reagent |
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When \(35 ~mL\) of \(0.15~ M\) lead nitrate solution is mixed with \(20 ~mL\) of \(0.12 ~M\) chromic sulphate solution, \(x× 10^{–5}\) moles of lead sulfate precipitate out. Calculate the value of \(x\). (Round off to the Nearest Integer)
1. 525 2. 124
3. 734 4. 223
Subtopic:  Limiting Reagent |
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