Reaction kinetics

Given the following balanced equation :

2NO(g) + Cl₂(g) → 2NOCl(g)

If the rate of disappearance of Cl₂ is 4.84 x 10^-2 Ms^-1, what is the rate of disappearance of NO?

• 1.45 x 10^-2 Ms^-1

• 2.42 x 10^-2 Ms^-1

• 3.67 x 10^-2 Ms^-1

• 9.68 x 10^-2 Ms^-1

The reaction A + 2B → products was found to have the rate law, k = k[A][B]². Predict by what factor the rate of reaction will increase when the concentration of B is doubled and the concentration of A remained uncanged

• 2

• 4

• 6

• 8

The overall order for the reaction,

2A + B → C

is one and with respect to B the order is zero. Which of the following statements is true?

• The rate law of the reaction is rate =k[A]²[B]

• The formation of C is double the appearance of A

• The rate of reaction would increase with increasing concentration B

• The rate law of the reaction is rate =k[A]

The catalyst alters the rate of a chemical reaction by,

• providing an alternative pathway with a lower Ea

• changing the products formed in the direction of the reaction

• providing a surface on which the molecules react

• increasing the frequencies of collisions between molecules

More collisions correspond to a: 

• Faster reaction rate  
• Slower reaction rate
• Constant reaction rate 
• None of the above

Decreasing the particle size increases the reaction rate because

• It makes particles move faster
• It increases the likelihood of collisions with the correct geometry
• It decreases the surface area available to react
• It increases the number of collisions

Which of the following increase the reaction rate?

• less surface area
• lower temperature
• an inhibitor
• increased concentration

Which of the following increase the reaction rate?

• less surface area

• lower temperature

• increasing pressure

• increased concentration

Determine the overall order of the reaction:

rate = k[A][B]⁰[D]

• First order

• Zero order

• Second order

• Third order

• all of these

A rate law relates

• A. reaction rate and temperature.

• B. reaction rate and concentration.

• C. temperature and concentration.

• D. energy and concentration.