(NH4)2Cr2O7 Chemistry Quiz

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Questions and Answers

What is the percentage composition of copper in [Cu(NH3)4]2+?

  • 25%
  • 45% (correct)
  • 35%
  • 55%

In the extraction of copper in the Bessemer converter, which of the following reactants is oxidized?

  • Cu2S (correct)
  • Cu2O
  • FeO
  • SiO2

Which compound undergoes mutarotation among the following?

  • [NiCl2(PMe3)2]
  • HCl solution (correct)
  • Cu2S
  • [AuCl4]–

What is enthalpy change of the reaction: Cu2S + O2 -> Cu2O + SO2?

<p>Exothermic (D)</p> Signup and view all the answers

What is the specific gravity of the final solution when HCl is diluted as described in question 1?

<p>1.2 (B)</p> Signup and view all the answers

Which compound has the highest double bond equivalent (DBE)?

<p>[Cu(NH3)4]2+ (B)</p> Signup and view all the answers

In which reaction does copper change its oxidation state?

<p>[Cu(NH3)4]2+ (D)</p> Signup and view all the answers

Which statement about entropy is correct?

<p>$\Delta S_{system}$ is zero for reversible processes (A)</p> Signup and view all the answers

'FeSiO3' is formed by which reaction?

<p>$\text{FeO} + \text{SiO}_2 -&gt; \text{FeSiO}_3$ (B)</p> Signup and view all the answers

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