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Eleventh Grade (Grade 11) Chemistry Questions

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Grade 11 :: Periodic Table and Elements by Ms_VThomas
Grade 11 :: Kinetics and Equilibrium by radiance
Grade 11 :: Reactions by radiance
Consider the following endothermic reaction:
[math]N_2(g) + O_2(g) rarr 2NO (g) [/math]
[math]DeltaH = +180 (kJ)/(mol[/math]

Which of the following statements correctly describes this endothermic reaction?
  1. Product is less stable than the reactants
  2. Heat is evolved in this reaction
  3. Reaction proceeds spontaneously in the forward direction
  4. Enthalpy of products is less than those of reactants
Grade 11 :: Oxidation-Reduction Reactions by radiance
Consider the following redox reaction

[math]H_2C_2O_4 (aq) + MnO_4^(-) (aq) rarr CO_2(g) + Mn^(2+) (aq) [/math]

What is the reduction half reaction for this redox reaction?
  1. [math](Mn)^(7+) (aq) rarr Mn^(2+) (aq) [/math]
  2. [math]H_2C_2O_4 (aq) rarr CO_2(g)[/math]
  3. [math](MnO_4)^(-) (aq) + 8H^(+) (aq) rarr Mn^(2+) (aq) + 4H_2O (l)[/math]
  4. [math]H_2C_2O_4 (aq) rarr 2CO_2 (g) + 2H^(+) (aq)[/math]
Grade 11 :: Oxidation-Reduction Reactions by radiance
Identify the reducing agent in the following reaction:

[math]I_2(aq) + 2S_2O_3^(2-) (aq) rarr S_4O_6^(2-) (aq) + 2I^(-) (aq)[/math]
  1. [math](S_2O_3)^(2-)[/math]
  2. [math]I_2[/math]
  3. [math](S_4O_6)^(2-)[/math]
  4. [math]I^(-)[/math]
Grade 11 :: Matter by narkey
Grade 11 :: Acids and Bases by Ms_VThomas
Grade 11 :: Oxidation-Reduction Reactions by radiance
Identify the oxidant in the following reaction:

[math]C_4H_4O_6^(2-) (aq) + ClO_3^(-) (aq) rarr CO_3^(2-) (aq) + Cl^(-) (aq) [/math]
  1. [math](ClO_3)^(-)[/math]
  2. [math](C_6H_4O_6)^(2-)[/math]
  3. [math](CO_3)^(2-)[/math]
  4. [math]Cl^(_)[/math]
Grade 11 :: Oxidation-Reduction Reactions by radiance
Identify the oxidant in the following reaction:
[math]3H_3AsO_3(aq) + BrO_3^(-) (aq) rarr Br^(-) (aq) + 3H_3AsO_4(aq)[/math]
  1. [math]BrO_3^(-) (aq)[/math]
  2. [math]H_3AsO_3[/math]
  3. [math]Br^(_) (aq)[/math]
  4. [math]H_3AsO_4[/math]
Grade 11 :: Quantum Physics and the Atom by tanyamajmudar
Grade 11 :: Quantum Physics and the Atom by tanyamajmudar
What are the SI units of Planck’s constant?
  1. Joule meter
  2. Newton per second
  3. Newton second
  4. Joule second
Grade 11 :: Quantum Physics and the Atom by tanyamajmudar
Grade 11 :: Quantum Physics and the Atom by tanyamajmudar
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