WorksheetsAQA Chem unit 1 GCSE 2022
Total questions: 40
Worksheet time: 21mins
What is a reversible reaction?
a reaction where the products of the reaction can react to produce further products
a reaction where the products can react to produce the original reactants
When a reversible reaction occurs in a sealed reaction vessel, when is equilibrium reached?
when all of the reactants are used up
when the amounts of the products and reactants are equal
when the rates of the forward and reverse rates are equal
How does a catalyst increase a reaction's rate?
it shifts the position of the equilibrium
it increases the energy of the reactants
it provides an alternative route for the reaction with a lower activation energy
Which of these reactions would be faster?
magnesium with concentrated acid
magnesium with dilute acid
the rate of reaction DOESN'T depend on...
frequency of collisions
volume of solution
temperature of the reactants
true or false? "A reversible reaction always takes in more energy in one direction than it gives out in the opposite direction"
true
false
True or false? "increasing the temperature of a reversible reaction will increase the yield of the exothermic reaction"
true
false
True or False? "the mean rate of reaction can be found by measuring the amount of reactant used over a period of time"
true
false
which of the following is a reason why increasing the temperature increases the rate of a reaction?
the reactant particles evaporate to form a gas
the reactant particles move faster so they collide more frequently
the reactant particles stick together more
what effect does adding a catalyst have on the overall energy change of the reaction?
increases it
decreases it
no effect
in a reaction between marble and hydrochloric acid, using small marble chips instead of a large piece of marble will produce...
no difference in the rate of reaction
a faster rate of reaction
a slower rate of reaction
crude oil is a...
renewable resource
finite resource
infinite resource
what happens to bromine when an alkene is added to it?
it turns cloudy
it turns from colourless to orange
it turns from orange to colourless
which of the methods below could be used to crack a long-chain hydrocarbon
mix the hydrocarbon with water and add a cold platinum catalyst
mix the hydrocarbon with steam and heat to a very high temperature
True or false? "Carboxylic acids form very strong acids when dissolved in water"
true
false
which technique is used to separate the components of crude oil?
cracking
filtration
fractional distillation
What colour is the flame produced when a calcium compound is burnt in a flame test?
green
brick red
yellow
what ion is barium chloride is used to test for?
sulfate
carbonate
hydroxide
true or false? "oxygen will relight a glowing splint"
true
false
Which class is better?
11.1
11.5
were both amazing
What is a pirates favourite element?
Au
Aaaargon
ScURvY
Fe
Which of these gases is NOT produced by complete combustion
carbon monoxide
water
carbon dioxide
what % of the Earth's atmosphere is made up of oxygen?
80
20
less than 1
1 billion
True or false? "nitrogen oxides form when fuels burn slowly at low temperatures"
true
false
Carbon monoxide is...
a toxic gas
greenhouse gas
cause of acid rain
the main goal of a life cycle assessment is to assess...
the total environmental cost of a product
the economic impact of a product
how long a product will be in use
the patience of year 11 students
NPK Fertilisers are formulations containing salts of...
nitrogen, phosphorous and potassium
nitrogen, potassium and krypton
copper, nitrogen and potassium
which of these will not affect the properties of a polymer
the monomers used
the quantity produced
the conditions it is made under
Why is bioleaching used?
its quicker than electrolysis
it produces copper with fewer impurities than electrolysis
it can be used on low grade ores
Which of these isn't a raw material in the Haber process?
hydrogen
nitrogen
oxygen
true or false? "the nitrogen used in the Haber process is obtained from the air"
true
false
true or false? "for water to be described as potable it must contain no salts"
true
false
how many hydrogen atoms does ethane contain?
2
4
6
8
how many hydrogen atoms does ethene contain
2
4
6
8
what is DNA?
a molecule with an amino groups and a carboxyl group
a polymer made up of amino acids
polymer chains connected by cross links
what word (s)are you not going to write in your C2 paper?
collisions
amount
why me?
please make it stop
you can test for halide ions by adding dilute nitric acid to a solution followed by
limewater
silver nitrate solution
sodium hydroxide solution
your finger
if a reversible reaction is endothermic in one direction what will it be in the other
endothermic
could be exothermic or endothermic
exothermic
why can the hydrocarbons be separated by fractional distillation?
they have different boiling points
they have different melting points
they have different viscosities
What will you miss most about your science lessons?
burning stuff
your friends
your teachers
learning new cool content
