Simple Collision Theory

Dough rises ______ at lower temperature.

• faster  

• slowly

• easier

• harder

Dough rises _______ at higher temperature

• rapidly 

• easier

• slowly

• harder

If solid  reactant is broken into smaller pieces, its surface area  of  contact ____

• Decrease

• Increase

• Enhance

• Reaction rate

The more effective collision, the _____ the rate of reaction

• Slower

• Particle size

• Faster

• Surface area

The more the ______ of contact, the higher the exposure to the other reactants.

• Reaction rate

• Particle size

• Collision

• Surface area

The candle that burns into flame in pure contains 100% of oxygen

• TRUE

• FALSE

The lower concentration shows few molecules, few collisions and low reaction rate.

• TRUE

• FALSE

The higher concentration shows many molecules, more collisions and greater reaction rate.

• TRUE

• FALSE

The more effective collision there are, the slower the rate of reaction.

• TRUE

• FALSE

Temperature is the average kinetic energy of particles affects the rate of reaction.

• TRUE

• FALSE