Rates of Reactions

Niamh Taylor
Quiz by Niamh Taylor, updated more than 1 year ago
Niamh Taylor
Created by Niamh Taylor over 5 years ago
49
2

Description

National 5 Chemistry (Unit 1) Quiz on Rates of Reactions, created by Niamh Taylor on 12/14/2015.

Resource summary

Question 1

Question
The rate of reaction depends on
Answer
  • Frequency of collisions between particles and energy of their collisions
  • Frequency of moving electrons
  • Amount of reactants used

Question 2

Question
How do you calculate rates of reactions?
Answer
  • time taken for change /change in reactant or product (x/y)
  • change in reactant or product/ time taken for change (y/x)

Question 3

Question
A factor affecting the rate of reaction is increased temperature.
Answer
  • True
  • False

Question 4

Question
Factors affecting the rate of reaction include
Answer
  • state, temperature and surface area, use of catalyst
  • volume of reactant, pressure and temperature, use of catalyst
  • temperature,concentration or pressure, surface area, use of catalyst

Question 5

Question
At a [blank_start]higher[blank_end] concentration, there is [blank_start]more[blank_end] particles in the same amount of space. This means the particles are more likely to collide and therefore more likely to [blank_start]react.[blank_end]
Answer
  • higher
  • Lower
  • more
  • lower
  • react.
  • not react.

Question 6

Question
As the pressure increases, the space in which the gas particles are moving becomes
Answer
  • smaller
  • bigger

Question 7

Question
The gas particles become closer together as the pressure increases causing less frequent collisions. This means the particles are less likely to react.
Answer
  • True
  • False

Question 8

Question
Catalysts are substances that increase the rate of reaction without being used up in the reaction. Catalysts never produce more product - they just produce the same amount of energy more quickly.
Answer
  • True
  • False

Question 9

Question
Catalysts work by
Answer
  • increasing activation energy
  • decreasing activation energy

Question 10

Question
Catalysts are important to industry because
Answer
  • Products can be made slower, reduce the need for higher temperatures and they can be reused
  • Products can be made quicker, reduce the need for higher temperature and they can't be reused
  • products can be made quicker, reduce the need for higher temperature and they can be reused
  • products can be made quicker, increase need for higher temperature and they can be reused

Question 11

Question
Any reaction involving a solid can only take place at the surface of the solid. If the solid is spilt into several pieces, the surface area [blank_start]increases[blank_end]. This means that there is an [blank_start]increased[blank_end] area for the reactant particles to collide with. The smaller the pieces, the [blank_start]larger[blank_end] the surface area. This means [blank_start]more[blank_end] collisions and a [blank_start]greater[blank_end] chance of reaction.
Answer
  • increases
  • increased
  • larger
  • greater
  • more

Question 12

Question
At a [blank_start]higher[blank_end] temperature, particles have [blank_start]more[blank_end] energy. This means they move [blank_start]faster[blank_end] and are more likely to collide with other particles. Also when the particles do collide they do so with more energy and so the number of successful collisions [blank_start]increases.[blank_end]
Answer
  • higher
  • more
  • faster
  • increases.
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