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WorksheetsBPS Y9 Chem Topic 2 Reaction Rates, Acids & Alkalis
Total questions: 25
Worksheet time: 13mins
Identify the correct word equation for complete combustion
fuel + oxygen → carbon dioxide + water
fuel + oxygen → carbon monoxide + water
fuel + air→ carbon dioxide + water
fuel → + oxygen + carbon dioxide + water
Which of the following reactions has the fastest reaction rate?
Oxidation
Rusting
Combustion
Precipitation
In which of the following reactions is iron slowly turned into iron oxide?
Respiration
Rusting
Combustion
Precipitation
Which chemical reaction does this definition match:
"An instantaneous chemical reaction in which two liquids react to form an insoluble solid"
Oxidation
Rusting
Combustion
Precipitation
Which of the following are the product (and by-product) formed during complete combustion
Soot
Water vapour
Carbon dioxide
Carbon monoxide
Heat
Which of the following is not a unit for rate of reaction?
g / sec
cm3 / sec
ml / hour
oC / min
Tick the box for the conditions necessary for a chemical reaction to take place...
The reactants must have the correct orientation
The reactants must have sufficient energy
The reactants must come into contact (collide) with each other
The reactants must have a spherical shape
Which of the following is the definition of Reaction Rate?
The change in concentration of the reactant(s) or product(s) per unit time
The change in temperature of the reactant(s) or product(s) per unit time
The change in mass of the reactant(s) and product(s) per unit time
The change in concentration of the reactant(s) or product(s) per unit mass
The __________ is the thing being dissolved.
solute
solvent
mixture
suspension
Which of the following is the definition of a catalyst?
A substance that alters the rate of reaction without chemically changing or getting used up
A substance that increases the concentration of the reactants without chemically changing itself or getting used up
A substance that alters the rate of reaction and chemically changes
A substance that alters the rate of reaction and gets physically used up
Relights a glowing splint is a test for which gas?
hydrogen
oxygen
carbon dioxide
air
Identify the correct word equation for the decomposition of hydrogen peroxide
hydrogen peroxide → water + oxygen
hydrogen monoxide → water + oxygen
hydrogen peroxide + manganese dioxide → water + oxygen + manganese
there is no chemical reaction
What is the test for carbon dioxide gas?
Put a glowing splint into a test tube full of carbon dioxide gas and it will light up
bubble the carbon dioxide gas into a test tube full of lime water
put a glowing splint into a boiling tube of carbon dioxide gas and it will make a squeaky pop
put a lighted splint into a test tube of carbon dioxide gas and it will extinguish the flame
Which of the following is not a product of an incomplete combustion?
Carbon dioxide
Carbon monoxide
Water vapour
Soot
By which method can you prove the composition of air?
Rusting
Precipitation
Chromotography
Oxidation
Which of the following does not make a chemical reaction faster?
use a catalyst
increase the surface area
increase the temperature
increase the concentration of the products
Why does reaction rate increase when the temperature rises?
Because more particles form as the temperature increases
Because the particles move faster and collide more frequently
Because the particles get bigger in volume
Because the solvent evaporates
How does a catalyst speed up the rate of reaction?
It adds more particles which result in more collisions
It uses it's energy to create heat to speed up collisions
It dissolves in a solvent to speed up the rate of reaction
It aligns the reactants and lowers the activation energy
What is the key safety precaution when measuring the rate of reaction between hydrochloric acid and magnesium?
You must sand down the sharp magnesium strips
You must not put cotton wool on the top of the conical flask to prevent “spitting” of the acid
You must put your thumb on top to cover the hydrogen from escaping through the atmosphere
You must put cotton wool on the top of the conical flask to prevent “spitting” of the acid
What is the test for nitrogen gas?
if a lit splint is inserted into a tube of the gas it will be extinguished
if a glowing splint is inserted into a tube of the gas it will re-light
if a lit splint is inserted into a tube of the gas it will produce a pop sound
bubbling the gas through limewater turns it milky
What is not needed for collision theory?
A catalyst
Sufficient energy
Correct orientation
A Collision
Choose answer in which the speed of reaction and type of chemical reaction match
Instantaneous : Explosion
Very slow : Precipitation
Medium: Magnesium burning
Fast: Rusting
