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WorksheetsRates of Reaction
Total questions: 30
Worksheet time: 18mins
Name
Class
Date
1.
Rate of chemical reaction means
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
2.
To show how surface area affects rate of reaction you will use one of the following methods.
a)
Add catalyst
b)
Increase the temperature
c)
Decrease the pressure of reactants
d)
Finely divide the reacting substances
3.
Reactions that give out heat to the surrounding are classified as one of the following:
a)
Spontaneous
b)
Sluggish
c)
Exothermic
d)
Endothermic
4.
One of the signs of a chemical reaction taking place is:
a)
Bubbles are produced in the reacting vessel
b)
Reactants are not combining
c)
Products are not forming
d)
Colour is not changing
5.
Which factors increase the rate of a reaction.
a)
increasing temperature
b)
increasing concentration
c)
increasing surface area
d)
all of these
6.
Increase in temperature of the reactants can do one of the following
a)
Slow collision frequency
b)
Allow less effective collision between the particles
c)
Neutralise the reaction
d)
increase collision between the particles thus increasing the rate.
7.
Why don't all collisions between particles cause a reaction?
a)
the particles also need to collide with a catalyst
b)
not all the particles collide with enough energy
c)
not all the particles collide at a high enough temperature
d)
the particles need to collide with each other twice
8.
Why does a catalyst increase the rate of reaction?
a)
it produces extra energy for the reactants
b)
it increases the speed of the reactant particles
c)
it increases the frequency of particle collisions
d)
it reduces the activation energy of the reaction
9.
Why does breaking up a solid reactant increase the rate of reaction?
a)
it creates more solid
b)
it creates more energy
c)
it increases the surface area
d)
it increases the concentration
10.
Why does a higher temperature increase the rate of a reaction?
a)
it increases both the frequency and energy of particle collisions
b)
it only increases the frequency of particle collisions
c)
it only increases the energy of particle collisions
d)
it reduces the activation energy of the reaction
11.
Which of these is NOT a benefit to using a catalyst?
a)
it increases the rate of reaction
b)
it increases the amount of product
c)
it can save time and money
d)
it can help reduce pollution
12.
In this image, the information in red is called the_______.
a)
Product
b)
Reactant(s)
c)
Chemical Subscript
13.
In this image, the information to the right of the arrow (in black) is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
14.
Read the following chemical formula: C6H12O6. How many hydrogen atoms are in the formula?
a)
12
b)
6
c)
4
15.
You mix lemon juice and baking soda. The temperature drops on the thermometer. This is a ______reaction.
a)
Exothermic
b)
Endothermic
c)
Ionic
16.
H2O is the chemical formula for ______.
a)
Salt
b)
Water
c)
Vinegar
17.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
c)
Isotopic
d)
Elemental
18.
The ______________is required to break the bonds of the reactants.
a)
Activation energy
b)
Plutonic energy
c)
Carbonic energy
d)
Heliocentric energy
19.
Which is most acidic?
a)
milk
b)
Lemon Juice
c)
bleach
20.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
21.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
8
c)
1
d)
2
22.
Neutralization forms both
a)
acid and base
b)
salt and water
c)
acid and water
d)
salt and base
23.
Reaction rate means...
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
24.
A substance that increases speed of chemical reaction without being used up is called:
a)
Catalyst
b)
Acid
c)
Base
d)
pressure
25.
Increase in temperature of the reactants can do one of the following
a)
Slow collision frequency
b)
Allow less effective collision between the particles
c)
Cause particles to lose speed
d)
Increase collision between the particles thus increasing the reaction rate.
26.
If the pH of a solution is 9, it is a/an....
a)
acid
b)
base
c)
both
d)
none
27.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
28.
Which NRL team does she go for?
a)
West Tigers
b)
Sydney Roosters
c)
Canterbury Bulldogs
d)
Brisbane Broncos
29.
Which country has Ms NOT visited?
a)
Cambodia
b)
Brazil
c)
Argentina
d)
America
30.
Which sport does Ms Tenedora play?
a)
Netball
b)
European Handball
c)
Boxing
d)
All of the above
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