Unit 4-5 MCQ

What is the molarity of a solution containing CIO₂ (aq) if 7.5 ml of the solution is needed to react completely with 20ml of .20 M MnO₄ solution?

2H20(1) + 4MnO,(aq) + 3C102(aq) → 4MnOz(s) + 3ClO4(aq) + 40H (aq)

• .10 M

• .20 M

• .30 M

• .40 M

When the following half-reactions below are combined and balanced the coefficient of the AI³⁺ will be

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

In which of the following species is the oxidation state fornitrogen the greatest?

• NO

• NO₂

• NO₃ ^-1

• NO₂ ^-1

If the following reaction is determined to be second order overall, what are the units of the rate constant, k?

• time ^-1

• L mol^-1 time ^-1

• mol L^-1 time ^-1

• cannot determine the order and units of k without experimental data

Tags

NGSS.HS-PS1-5

• 0.10 Ms^-1 because the rate constant of a specific reaciton is constant at a given temperature

• 0.10 Ms^-1 because Y is now a limiting reactant and adding more X can't increate the rate

• 0.20 Ms^-1 because doubling the concentration of X will double the rate

• 0.60 Ms^-1 because the coefficient of X in the balanced equation is 3 and the concentration of Xis doubled so 3x2=6

Tags

NGSS.HS-PS1-5

• O

• 1/2

• 1

• 2

Tags

NGSS.HS-PS1-5

• reactant

• catalyst

• inhibitor

• intermediate

Which of the following is the most likely sequence and oritnetaion of the collisions of the reactants that would result in the overall reaction shown?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-5

An energy profile for a reaction is shown. Which mechanism below correctly describes the process shown ?

• T + A → AT Slow

  AT → Z fast

• AT → Z

• T + A → AT fast

  AT → Z slow

• T + A → AT fast

  AT + Z → ZAT slow

  ZAT → X fast

Tags

NGSS.HS-PS1-4

When methanol, CH₃OH(I) is burned the products are water and carbon dioxide. Use the reaction shown below to determine which of the following statements is correct.

2CH3OH(l) + 302(g) → 4H20(l) + 6CO2(g)

• Methanol is being consumed at twice the rate at which water is being formed.

• The reactants are disappearing half as fast as the products are appearing.

• Carbon dioxide is being consumed twice as fast as oxugen is being prodcued.

• The rate of production of carbon dioxide is twice the rate of disappearance of methanol.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-7