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WorksheetsUnit 5 assessment - Reactions
Total questions: 33
Worksheet time: 8hrs 15mins
Look at the statements below. Select the statement that shows a chemical reaction has taken place.
A solid substance will melt.
Bubbles appear in the substance
The substance dissolves when being stirred in water
Look at the picture of the student performing the experiment. Identify the correct set of safety rules she is following.
Wearing safety goggles, Using her fingers to identify the solution, Using a test tube rack
Hair tied back, Using a test tube rack , Wearing a lab coat
Wearing a lab coat, Hair tied back , Wearing Safety goggles
Wearing safety goggles, Hair tied back, Using a test tube rack
When using liquids they may be dangerous. Choose the name of the type hazard for the description below.
Could cause slight swelling or redness on the skin.
Irritant
Corrosive
When using liquids they may be dangerous. Choose the name of the type of hazard for the description below.
Could burn skin and eyes.
Irritant
Corrrosive
A neutral substance has a pH level that will be
Greater than 7
Less than 7
Equal to 7
A alkali substance will have a pH level
Greater than 7
Less than 7
Equal to 7
A acid will have a pH level
Greater than 7
Less than 7
Equal to 7
Complete the sentence below by selecting the correct word.
When a metal or non metal reacts with oxygen an .............. is formed
Oxate
Oxide
Oxlate
Oxo
Complete the sentence below by inserting the correct word.
At room temperature (20C), metal oxides are mostly ...............
Solids
Liquids
Gases
Complete the sentence below by inserting the correct word
At room temperature (20C) non metal oxides are mostly ..................
Solids
Liquids
Gases
Complete the sentence below by inserting the correct word
They are also different types of substances. Non metal oxides are mostly ..................
Acids
Alkalis
Neither
Complete the sentence below by inserting the correct word
They are also different types of substances. Metal oxides are mostly ...........
Acids
Alkalis
Neither
Complete the word equation below by selecting the correct outcome.
Metal + acid ----> .................. + ..................
Hydrogen + Calcium
Salt + Calcium
Salt + Hydorgen
Select the answer below that shows 3 properties of metals.
Shiny, Usually solid at room temperature & Good conductors of heat/electricity
Dull/Not Shiny, Usually liquid at room temperature & Bad conductors of heat/electricity
Brittle, Dull/Not shiny & Good conductors of heat/electricity
Select a metal that is liquid at room temperature (20c)
Gallium
Gold
Mercury
Aluminium
Copper
Select a non metal that is liquid at room temperature (20c)
Carbon
Sulfur
Bromine
Phosphorous
Iodine
Select the term for a something that is used to test whether a solution is an acid or alkali
pH scale
Test Tube
Indicator
What colour does red litmus paper turn in acids ?
Stays Red
Turns Blue
Turns green
What colour does red litmus paper turn in alkalis ?
Stays red
Turns Blue
Turns Green
What colour does blue litmus paper turn in acids ?
Stays Blue
Turns Red
Turns Green
What colour does blue litmus paper turn in alkalis ?
Stays Blue
Turns Red
Turns Green
In some experiments, universal indicator is used instead of blue and red litmus paper. Explain why ?
It is Quicker
It is cleaner
Litmus paper has an expiration date
Universal indicator can tell you how acidic or alkaline a solution is by giving you a specific pH level.
Name the salts produced in the reactions below :
hydrochloric acid + sodium hydroxide =
Sodium hydrochloric acid
Sodium Sulfate
Sodium Nitrate
Sodium Chloride
Name the salts produced in the reactions below :
Nitric acid + Sodium hydroxide =
Nitric Hydroxide
Nitric Sodium acid
Sodium Nitrate
Sodium Chloride
Name the salts produced in the reactions below :
Sulfuric acid + Calcium hydroxide =
Sulfuric Nitrate
Calcium Sulfate
Calcium acid
Sulfuric Hydroxide
State one similarity between an alkali and a base.
Bases and alkalis have the same pH level as acids.
Bases and alkalis dissolve in water
Bases and alkalis both neutralise acids
State one difference between an alkali and a base.
Alkalis are insoluble in water & bases soluble
Alkalis are soluble in water & bases are insoluble
Alkalis and bases cannot neutralise acids.
Select the correct method to make copper sulfate crystals using copper oxide powder and dilute hydrochloric acid.
1- Add copper oxide powder to dilute hydrochloric acid until no more can dissolve.
2- Heat the copper sulfate solution in an evaporating dish over a Bunsen burner until most of the water has evaporated.
3- Use filter paper and a funnel to filter out any undissolved copper oxide.
4- Leave the evaporating basin in a warm place for the rest of the water to evaporate. Only the pure copper sulfate crystals remain.
1- Leave the evaporating basin in a warm place for the rest of the water to evaporate. Only the pure copper sulfate crystals remain.
2- Heat the copper sulfate solution in an evaporating dish over a Bunsen burner until most of the water has evaporated.
3- Use filter paper and a funnel to filter out any undissolved copper oxide.
4- Add copper oxide powder to dilute hydrochloric acid until no more can dissolve.
1- Add copper oxide powder to dilute hydrochloric acid until no more can dissolve.
2- Use filter paper and a funnel to filter out any undissolved copper oxide.
3- Heat the copper sulfate solution in an evaporating dish over a Bunsen burner until most of the water has evaporated.
4- Leave the evaporating basin in a warm place for the rest of the water to evaporate. Only the pure copper sulfate crystals remain.
Use the table and observe the data to answer the question below .
Identify the plant that has the greatest range for soil pH.
Apple Tree
Cabbage
Onion
Tea
Tomato
Use the table and observe the data to answer the question below .
Identify the plant that has the smallest range for soil pH.
Apple Tree
Cabbage
Onion
Tea
Tomato
Use the table and observe the data to answer the question below .
A farmer tests his soil and finds that it has a pH of 5.5. So which two plants would not grow well in that soil?
Cabbage & Apple Tree
Tomato & Tea
Apple Tree & Onion
Onion & Cabbage
Tomato & Apple Tree
What could the farmer do to the soil to improve it so that a greater range of crops can be grown ?
Add an acid to help neutralise the soil
Add an Alkali/base to help neutralise the soil
Add water to help neutralise the soil
Do nothing and plant more crops
What is a displacement reaction ? Select the correct definition below.
A reactions where both metal combine together to produce a more reactive metal
A reaction where a less reactive metals takes the place of a more reactive metal.
A reaction where a more reactive metals takes the place of a less reactive one.
A reactions where both metal combine together to produce a less reactive metal
