1361719
Pregunta 1
Pregunta
Emulsifiers help water and oil mix.
Respuesta
- True
- False
Pregunta 2
Pregunta
The hydrophilic end of each emulsifier molecule bonds to .......
Respuesta
-
Water molecules
-
Oil molecules
Pregunta 3
Pregunta
Ice cream is a food that contains an emulsifier.
Respuesta
- True
- False
Pregunta 4
Pregunta
What do protein molecules do when they have been cooked?
Respuesta
-
Shrink
-
Expand
-
Change shape
Pregunta 5
Pregunta
What happens when you cook a Potatoes?
Respuesta
-
The inside becomes soft and that makes the potatoes fluffy.
-
The cell walls break down making the starch cells swell up and spread out.
Pregunta 6
Pregunta
What chemical reaction does baking powder undergo when heated?
Respuesta
-
Incomplete combustion
-
Thermal decomposition
Pregunta 7
Pregunta
What is the word equation for sodium hydrogen carbonate thermal decomposition?
Respuesta
-
Sodium hydrogencarbonate - sodium carbonate + carbon dioxide + water
-
Sodium hydrogen carbonate - sodium carbonate + oxygen + water
Pregunta 8
Pregunta
Baking powder is used in baking cakes, the carbon dioxide produced makes the cakes rise.
Respuesta
- True
- False
Pregunta 9
Pregunta
Carbon dioxide can be detected using .....
Respuesta
-
Bromine water
-
Limewater
Pregunta 10
Pregunta
Limewater turns cloudy when what is detected.....
Respuesta
-
Oxygen
-
Carbon dioxide
Pregunta 11
Pregunta
The word equation for making esters is:
Acid + alcohol - ester + water
Respuesta
- True
- False
Pregunta 12
Pregunta
Identify the properties that perfumes need.
Respuesta
-
Non toxic
-
Soluble in water
-
Easily evaporates
-
Flavourings
-
Insoluble in water
-
Doesn't react with water
-
Doesn't irritate the skin
Pregunta 13
Pregunta
Polymers are short chains of molecules.
Respuesta
- True
- False
Pregunta 14
Pregunta
Polymers are made by heating a catalyst and the double bond of small monomers breaks open and is able to join with another monomer.
Respuesta
- True
- False
Pregunta 15
Pregunta
What is the reaction of making polymers called?
Respuesta
-
Polymerisation
-
Carbon based polymer
Pregunta 16
Pregunta
What is gore-tex?
Respuesta
-
A breathable fabric that allows water to evaporate but doesn't let any water in.
-
A stretchy fabric used to make clothes.
Pregunta 17
Pregunta
Most polymers aren't biodegradable, why is this a problem?
Respuesta
-
They aren't broken down by micro organisms so they don't rot.
-
Water ruins it.
Pregunta 18
Pregunta
Why do we cook food?
Respuesta
-
Change taste, change texture, kill bacteria, easier to digest.
-
Smells nicer, tastes nicer, kill bacteria.
Pregunta 19
Pregunta
What statements are correct about Alkanes.
Respuesta
-
They are made from only hydrogen and carbon atoms.
-
All Alkanes have single bonds.
-
Alkanes are unsaturated compounds.
-
Alkanes have double bonds.
-
Alkanes are saturated compounds.
Pregunta 20
Pregunta
What is fractional distillation used for?
Respuesta
-
Separating crude oil.
-
Preparing crude oil.
Pregunta 21
Pregunta
Is this the equation for incomplete combustion of a hydrocarbon?
Hydrocarbon + oxygen - carbon dioxide + water + carbon monoxide + acid
Respuesta
- True
- False
Pregunta 22
Pregunta
How do you calculate energy?
Respuesta
-
Mass x specific heat x temp = mcT
-
Weight x heat x volume = mcT
Pregunta 23
Pregunta
What is exothermic?
Respuesta
-
Heat given out.
-
Heat taken in.
Pregunta 24
Pregunta
What is endothermic?
Respuesta
-
Heat given out.
-
Heat taken in.
Pregunta 25
Pregunta
Flavour enhances are a type of emulsifier.
Respuesta
- True
- False
Pregunta 26
Pregunta
What are the environmental problems with oil?
Respuesta
-
Oils spills.
-
Wars.
-
Acid rain.
-
Global warming.
-
Extinction.
Pregunta 27
Pregunta
Political problems with oil are .....
Respuesta
-
Wars over pipelines.
-
Global warming.
-
Rise In oil prices.
Pregunta 28
Pregunta
You need heat and a catalyst to be able to perform cracking.
Respuesta
- True
- False
Pregunta 29
Pregunta
What is cracking?
Respuesta
-
The splitting up of long chain hydrocarbons.
-
Another name for fractional distillation.
Pregunta 30
Pregunta
Double covalent bonds Make up what kind of polymer?
Respuesta
-
Addition polymer
-
Polymerisation.
Pregunta 31
Pregunta
What is crude oil formed from?
Respuesta
-
The buried remains of plants and animals.
-
Buried rocks in the ocean.
Pregunta 32
Pregunta
What does cracking do?
Respuesta
-
Helps match supply to demand.
-
Makes more crude oil.
Pregunta 33
Pregunta
The word equation for complete combustion of any hydrocarbon is ....
Hydrocarbon + oxygen - carbon dioxide + water
Respuesta
- True
- False
Pregunta 34
Pregunta
What is the definition of health?
Respuesta
-
A state of physical, social and mental well-being.
-
Being free from infection and disease.
Pregunta 35
Pregunta
What is the definition of Fit?
Respuesta
-
A measure of how well you can perform a physical task.
-
The same as health.
Pregunta 36
Pregunta
How do you measure fitness?
Respuesta
-
Strength
-
Stamina
-
Agility
-
Flexibility
-
Speed
-
Blood pressure
-
Age
Pregunta 37
Pregunta
Systolic pressure is when blood pressure is at its highest when the heart contracts.
Respuesta
- True
- False
Pregunta 38
Pregunta
What is blood pressure measured in?
Respuesta
-
mm of mercury
-
Cm
Pregunta 39
Pregunta
What can increase your blood pressure?
Respuesta
-
Smoking
-
Being overweight
-
Too much alcohol
-
Constant stress
-
Age
-
Unhealthy diet
Pregunta 40
Pregunta
What can health problems can high blood pressure lead to?
Respuesta
-
Strokes
-
Kidney damage
-
Brain damage
-
Lung damage
Pregunta 41
Pregunta
Kwashiorkor is caused by eating too little protein.
Respuesta
- True
- False
Pregunta 42
Pregunta
You calculate BMI using the following formulae:
BMI = body mass
(Height)2
Respuesta
- True
- False
Pregunta 43
Pregunta
Types of pathogens:
Respuesta
-
Fungi
-
Flu
-
Bacteria
-
Viruses
Pregunta 44
Pregunta
A malignant tumour is where the tumour grows and can spread to other sites in the body.
Respuesta
- True
- False
Pregunta 45
Pregunta
Types of drugs:
Respuesta
-
Depressants
-
Stimulants
-
Coffee
-
Painkillers
-
Performance enhancers
-
Hallucinogens
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