15 questions
Fill in the blank: Periodic table is a method of classifying ___ and used to predict properties of ___
Matter
Elements
Atoms
Ions
Atoms are made of the following subatomic particles:
protons, nucleus, electrons
protons, neutral, electrons
protons, neutrons, electrons
nucleus, electrons
Atoms are...
Neutral (no charge)
Positively charged
Negatively charged
positive or negative
Ions are...
Neutral (no charge)
Negatively charged
Positively charged
Positive or Negative
What method of purification is this?
Filtration
Crystallisation
Distillation
Fractional distilation
What would be in the beaker?
Salt and water
Salt
Water
Salty water
The composition of clean air is:
78% Nitrogen, 21% Oxygen, small quantities of noble gases, water vapour and carbon dioxide
21% Nitrogen, 78% Oxygen, small quantities of noble gases, water vapour and carbon dioxide
78% Nitrogen, 21% Oxygen, large quantities of noble gases, water vapour and carbon dioxide
21% Nitrogen, 78% Oxygen, large quantities of noble gases, water vapour and carbon dioxide
What factors affect the rate of reaction?
Temperature
Surface area
Pressure / concentration
All factors mentioned affect the rate of reaction
The reactions listed below results in the formation of which product?
Complete combustion of carbon-containing substances
Respiration
Reaction between an acid and a carbonate
Thermal decomposition of calcium carbonate
Carbon
Hydrocarbon
Carbon monoxide
Carbon dioxide
What happens when you carry out electrolysis of molten sodium chloride?
At the cathode (+), you get chlorine.
At the anode (-), you get sodium.
At the cathode (-), you get sodium.
At the anode (+), you get chlorine.
At the cathode (-), you get chlorine.
At the anode (+), you get sodium.
At the cathode (+), you get sodium.
At the anode (-), you get chlorine.
The test for carbon dioxide is:
Relights a glowing splint
Turns limewater milky
Makes a squeaky pop with a lighted splint
bleaches damp litmus paper
What is seen during the electrolysis of aqueous sodium chloride?
At the cathode (+), you get hydrogen gas.
At the anode (-), you get chlorine gas.
A solution of sodium hydroxide is formed.
At the cathode (+), you get chlorine gas.
At the anode (-), you get hydrogen gas.
A solution of sodium hydroxide is formed.
At the cathode (-), you get chlorine gas.
At the anode (+), you get hydrogen gas.
A solution of sodium hydroxide is formed.
At the cathode (-), you get hydrogen gas.
At the anode (+), you get chlorine gas.
A solution of sodium hydroxide is formed.
What happens when you carry out electrolysis of lead (II) bromide?
At the cathode (-), you get lead.
At the anode (+), you get bromine.
At the cathode (+), you get lead.
At the anode (-), you get bromine.
At the cathode (-), you get bromine.
At the anode (+), you get lead.
At the cathode (+), you get bromine.
At the anode (-), you get lead.
How confident are you with Chemistry?
Not so confident, need to revise over some more topics
I'm ok!
Confident!
Which topic(s) would you like to revise over?