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20 questions
Combustion is when a __________ reacts with oxygen
petrol
fuel
fire triangle
carbon dioxide
Glucose/sugar and oxygen are...
products of cell respiration
reactants of cell respiration
Cells do cell respiration in order to make
water
glucose
energy (ATP)
oxygen
Which two things are given out when something is burning?
heat
reflection
light
iron
What two things does an iron object need to rust?
paint
oxygen
water
sugar
What part of air is used in burning?
nitrogen
other gases
carbon dioxide
oxygen
What was the chemical name given to Rust ?
Carbon
Iron Oxide
Iron Oxygen
hydrated iron oxide
Which diagram shows the most favourable conditions for rust to appear on the nail?
A
B
C
D
When Iron rusts, its weight
Increases
Decreases
Remains constant
If a piece of coal is heated, it produces a flame. If coal dust is heated, it explodes. What is the reason of this difference?
expansion of air
large surface tension
large surface area
reaction with oxygen
When iron reacts with oxygen to form iron oxide as in hand warmers, it gives out heat. What is the name of such reactions?
endothermic
exothermic
reduction
neutralization
Steel is a compound of:
iron and nickel
iron and tin
iron and carbon
nickel and chromium
Stainless steel is an alloy of:
tin and carbon
iron and zinc
nickel and chromium
iron and aluminium
The process of coating zinc on iron to protect it is called:
oxidation
verdigris
galvanization
painting
Chemicals that are used to slow down the oxidation of fats and oils is called
nitrogen
antioxidants
colour
alloys
When bronze reacts with oxygen, it develops a thin green film. What is the coating called?
verdigris
patina
tarnish
galvanization
Copper reacts with air forming a green coating. What is this called?
patina
verdigris
tarnish
What is the word equation for the reaction between baking soda and vinegar?
sodium bicarbonate + vinegar → sodium acetate
sodium bicarbonate + ethanoic acid → sodium acetate + water
NaHCO3 + CH3COOH → CO2 + H2O + NaCH3COO
sodium bicarbonate + ethanoic acid → sodium acetate + carbon dioxide + water
What is the word equation for anaerobic respiration?
glucose + oxygen → carbon dioxide + water + energy
glucose + oxygen → carbon dioxide + energy
glucose → lactic acid + carbon dioxide + water
glucose → lactic acid + energy
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