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Twelfth Grade (Grade 12) Kinetics and Equilibrium Questions

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Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
Consider the following chemical reaction:

[math]2CH_3CHO (g) -> CH_4(g) + CO(g)[/math]

What is the correct expression for the rate law of this chemical reaction?
  1. [math]Rate=k[CH_3CHO]^2[/math]
  2. [math]Rate=k[CH_3CHO][/math]
  3. [math]Rate=k[CH_4] [CO][/math]
  4. [math]Rate=k[CO][/math]
Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
Which statement correctly describes a saturated solution?
  1. The solvent can dissolve more solute if it is added
  2. The solvent cannot contain undissolved solute
  3. The dissolved form of the solute is at equilibrium with the undissolved solute
  4. The dissolved solute is not at equilibrium with the undissolved solute
Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
Consider the following chemical reaction

[math]H_2O_2 (aq) rarr H_2O(l) + (1/2)O_2(g)[/math]
  1. Unimolecular reaction
  2. Bimolecular reaction
  3. Trimolecular reaction
  4. Tetramolecular reaction
Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
Consider the following gas-phase reaction

aA(g) + bB(g) [math]harr[/math] cC(g) + dD(g)

What is its partial pressure equilibrium constant expression?
  1. [math]K_p = (p_C)^c (p_D)^d[/math][math][/math]
  2. [math]K_p = (p_A)^a (p_B)^b[/math]
  3. [math]K_p = (p_C)^c (p_D)^d// (p_A)^a (p_B)^b[/math][math][/math][math][/math]
Grade 12 Kinetics and Equilibrium
Which of the following rate laws is correct for a unimolecular reaction?
  1. Rate=k[A]
  2. Rate=k[A][B]
  3. Rate=k[A][B][C]
  4. None of the above
Grade 12 Kinetics and Equilibrium
For the equilibrium, [math]A harr 2B + Heat[/math], the number of A molecules increases if
  1. volume is increased
  2. temperature is increased
  3. catalyst is added
  4. concentration of 2B is decreased
Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
Which of the following chemical reactions is an example of a first-order reaction?
  1. [math]N_2O_5(g) rarr N_2O_4 (g) + (1/2) O_2(g)[/math]
  2. [math]CH_3CHO (g) rarr CH_4(g) + CO(g)[/math]
  3. [math]2HI (g) rarr H_2(g) + I_2(g)[/math]
  4. [math]2NO + Cl_2 rarr2NOCl[/math]
Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
The rate of reaction depends on the surface area of catalyst in
  1. homogenous catalysis
  2. enzyme catalysis
  3. acid catalysis
  4. heterogenous catalysis
Grade 12 Kinetics and Equilibrium
The molecularity and the order of reactions
  1. are always same
  2. are always different
  3. may be same
  4. none of these
Grade 12 Kinetics and Equilibrium
Grade 12 Kinetics and Equilibrium
The rate constant depends upon
  1. Temperature
  2. Time
  3. Initial Concentration
  4. None of these
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