Worksheets13-09-2021 Year 11 Chemistry Quiz 1- C5 Chemical Changes
Total questions: 30
Worksheet time: 15mins
C5.1- Which of these metals is the most reactive?
Magnesium
Potassium
Zinc
Copper
C5.1- What gas is made when you react a metal with an acid?
Carbon dioxide
Oxygen
Chlorine
Hydrogen
C5.1- Which of these is not a valid way of finding where metals sit in the reactivity series?
Compare their reactions with water
Compare their reactions with acid
Compare their reactions with oxygen
Compare their reactions with copper sulfate solution
C5.1- Which of these is the correct balanced equation for the reaction between sodium and water?
C5.2- Why is there no reaction between sodium and potassium chloride solution?
Because the activation energy is too high
Because the particles are too big
Because sodium is not reactive enough to displace potassium
Because potassium is not reactive enough to displace sodium
C5.2- Which element is included in the reactivity series to show which metals can react with acids?
Oxygen
Hydrogen
Carbon
Chlorine
C5.2- Which of these is not an observation you would make when reacting a piece of lithium with copper sulfate solution?
The blue colour of the copper sulfate solution would fade
Smoke would be given off
An orange-brown solid of copper would form in the container
The temperature of the solution would increase
C5.2- Which of these is the most accurate definition of the word oxidation?
Loss of electrons
Gain of electrons
Loss of oxygen
Gain of oxygen?
C5.2- Which of these is not a possible definition of the word reduction?
Loss of metal
Gain of electrons
Loss of oxygen
Gain of hydrogen
C5.3- Which element is commonly used to extract less reactive metals from their ores?
Hydrogen
Carbon
Oxygen
Nitrogen
C5.3- Which of these metals is not found in the Earth's crust in its native form?
Copper
Silver
Gold
Platinum
C5.3- What is the name of the process with which metals are extracted from their ores?
Oxidation
Reduction
Elimination
Combustion
C5.3- What is the name of the process used to extract more reactive metals from their ores?
Oxidation
Elimination
Electrolysis
Hydrolysis
C5.4- What is the product of reacting iron with hydrochoric acid?
Iron hydride
Iron hydroxide
Iron chloride
Iron hydrochloride
C5.4- Why can't copper sulfate be made by reacting copper metal with sulfuric acid?
Copper isn't reactive enough
Sulfuric acid is too reactive
The activation energy is too high
The reaction is too dangerous
C5.4- What is the correct formula of calcium chloride?
C5.4- Once you have reacted a metal with an acid, how do you extract the salt from the solution?
Filtration
Crystallisation
Chromatography
Titration
C5.5- What is the product of reacting copper oxide with sulfuric acid?
Copper
Copper sulfate
Copper sulfide
Sulforous copper
C5.5- When making soluble salts, which of these is not a reason to add excess metal oxide solid?
To make the maximum amount of product
To ensure no acid is boiled in the next step
To make a purer product
To make the reaction go quicker
C5.5- How do you extract excess copper oxide from the reaction mixture when making a soluble salt?
Filtration
Distillation
Crystallisation
Chromatography
C5.6- What is the easiest indication that you have added enough metal carbonate to react all of an acid?
The reaction fizzes when you add more
The reaction stops fizzing when you add more
The reaction stops changing colour when you add more
The solution decreases in temperature when you add more
C5.6- What do you need to identify the endpoint of the reaction between an acid and an alkali?
Measuring cylinder
Indicator
Microscope
Ruler
C5.6- After completing a titration, what is the next step to extract a pure salt from the resulting solution?
Evaporate off the water
Filter to remove the salt
Make note of the volume of acid and alkali used and repeat the experiment without the indicator
Filter to remove the indicator
C5.6- What is the correct formula of sodium carbonate?
C5.7- What happens to the pH of a solution when you add more acid?
It increases
It decreases
It stays the same
It depends on the temperature
C5.7- What colour is universal indicator in a strong alkaline solution?
Red
Yellow
Green
Purple
C5.7- What colour does phenolphthalein turn in acidic solution?
Red
Colourless
Yellow
Pink
C5.8- What is the pH of a solution with acid concentration shown?
1
10
-5
5
C5.8- What is the typical pH of a weak acid?
1
3
7
9
C5.8- What is meant by the term weak acid?
A dilute acid
An acid that is safe to drink
An acid that is insoluble in water
An acid that only partially dissociates in water
