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WorksheetsChemical reactions
Total questions: 21
Worksheet time: 12mins
Which one of the following is a characteristic of a chemical change?
Light being given off
Change of state
Change of shape
Change of size
Which one of the following is a characteristic of Physical change?
Light being given off
Heat being given off
Bubbles appearing
Change of state
What is an exothermic reaction?
Heat is taken in from the external environment by the chemical reaction and temperature decreases
Heat is given off to the external environment by the chemical reaction and the temperature increases.
What is an endothermic reaction?
Heat is taken in from the external environment by the chemical reaction and temperature decreases
Heat is given off into the external environment by the chemical reaction and temperature increases
What are the chemicals entering a chemical reaction called?
Reactors
Reactants
Products
Elements
What are the chemicals made as a result of a chemical reaction called?
Reactors
Reactants
Products
Elements
What does the arrow labelled A represent?
Product energy
Activation energy
Reactant energy
Final energy
What kind of thermal reaction is A?
Endothermic
Exothermic
What kind of thermal reaction is B?
Endothermic
Exothermic
What is meant by 'rate of reaction'?
The amount of time for the reactants to begin reacting
The amount of energy spent on reacting
The about of time for a reaction to take place
The amount of time it takes for energy to be conserved
Which of the following is a factor that affects rate of reaction?
Equipment
Temperature
Sunlight intensity
Length
What is Surface area?
a measure of how much length there is
a measure of how much mass there is
a measure of how much of a substance is exposed
a measure of how much matter there is per unit volume
What is a catalyst?
a substance that has an effect on a chemical reaction
a substance that speeds up the rate of a chemical reaction
a substance that increases volume
a substance that increase the mass
What are the reactants for making oxygen gas?
Hydrogen peroxide and manganese dioxide
Carbon dioxide and sulphuric acid
Carbon monoxide and hydrochloric acid
Sulfuric acid and manganese dioxide
How do you test for the presence of oxygen gas?
you will hear a pop sound when you put in a lit splint
it will extinguish a lit splint
it will relight a glowing splint
it will turn blue litmus red
What are the reactants for making carbon dioxide?
Hydrochloric acid and Sulfuric acid
Sulfuric acid and calcium carbonate
calcium chloride and hyrdogen peroxide
Hydrochloric acid and calcium carbonate
What is the positive test for the presence of Carbon Dioxide?
It relights an extinguished splint
it extinguishes a lit splint
you will hear a pop sound when you put in a lit splint
it turns a red litmus blue
Which of the following is an example of chemical change?
Chopping wood
Frying an egg
Tearing a sheet of paper
Melting an ice cube
What is concentration a measure of?
how much volume per mass
how much mass per volume
how many particles per unit volume
name this piece of equipment
Beaker
Graduated cylinder
pipette
conical flask
name this piece of equipment
Beaker
Pipette
Graduated cylinder
Conical flask
