PRE CLASS ASSESSMENT: REACTION KINETIC

Rate of reaction is ____________

• the change in colour of solution with time.

• time taken for the reactant to change

• the change in concentration with time

• time taken for the reaction to completely consumed

For the reaction below, choose a CORRECT statement.

• the concentration of C₂ increased after 5 minutes reaction.

• the concentration of A and B increased when the reaction begin

• the reaction of A, B and C₂ are at equilibrium

• the change in concentration A and B directly proportional to the concentration of C₂

A student want to dissolved 5 g of NaCl in water. The time taken for salt to dissolved at room temperature is 5 minutes. Predict the time taken if the same amount of salt dissolved in cold water.

• 5 minutes

• 2.5 minutes

• 10 minutes

• the salt cannot dissolved in cold water

Marry want to prepare a mashed potato. Thus, she need to boil the potatoes. Which potatoes will take less time to boil.

• potato A

• potato B

• both potato take the same time to boil

• potato c

If we compare the same amount of brown sugar, why brown sugar cube take a longer time to dissolved in water compared to a fine brown sugar.

• the size of brown sugar cube is bigger than fine brown sugar.

• brown sugar cube has greater surface area than fine brown sugar

• fine brown sugar has greater surface are than brown sugar cube

• brown sugar cube is more compact compared to fine brown sugar

What is the function of tungsten in Reaction II?

• as a metal

• as a initiator

• as a catalyst

• as an indicator

Which reaction will take less time taken to formed product B?

• Reaction I

• Reaction II

• Reaction I & Reaction II

• none of the reaction

For the reaction between E and F produced G. The rate law is:
rate: k[E]²[F]⁰

What is the overall order of reaction?

• second order

• third order

• zero order

• first order