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WorksheetsRevision CHEMS
Total questions: 15
Worksheet time: 8mins
What are the subatomic particles in the nucleus?
Neutron only
Proton and neutron
Electron and proton
Electron and neutron
Carbon-14 is an isotope of carbon. What is the use of carbon-14?
Estimate the age of fossils and artefacts
Radiotherapy for the treatment of cancer
Regulate the heartbeats of patients with heart problems
Destroy bacteria in food without changing the quality of food
PCl5
Diagram 3 shows the chemical formula of a substance. What is the name of the substance?
Phosphorus pentachloride
Phosphorus trichloride
Phosphorus chlorate
Phosphorus chloride
What is the meaning of empirical formula?
Formula that shows the actual number of atoms of each element in the compound
Formula that shows the simplest ratio of atoms of each element in the compound
Formula that shows how the atoms of elements are bonded together
Formula that shows the type of element in the compound
Which substance is a covalent compound?
Sodium carbonate
Copper (II) nitrate
Hydrogen chloride
Tin (II) oxide
Which of the following solutions has the lowest pH value?
0.1 mol dm-3 ethanoic acid
0.1 mol dm-3 sulphuric acid
0.1 mol dm-3 aqueous ammonia
0.1 mol dm-3 sodium chloride
Which of the following is a soluble salt?
Silver chloride
Barium sulphate
Potassium nitrate
Copper (II) carbonate
Diagram 8 shows the National Monument which is made up of bronze.
What is the main metal in bronze?
Magnesium
Copper
Iron
Tin
Diagram 9 shows the symbol of atom X.
What is the electron arrangement for ion of X?
2.8
2.8.1
2.8.2
2.8.8.5
Diagram 10 shows the electron arrangement of a compound.
Which of the following statements is true for the compound?
Can conduct electricity in molten and aqueous solution
Solid at room temperature
Low melting point
Soluble in water
Diagram 11 shows the reaction between calcium carbonate and glacial ethanoic acid.
No changes are observed after the reaction.
What should be done in order to make the lime water cloudy?
Change calcium carbonate chips to calcium carbonate powder
Substitute calcium carbonate with zinc powder
Shake vigorously the mixture
Add water to the mixture
Why are weather balloons filled with helium rather than hydrogen?
Helium is found in air
Helium is less dense than hydrogen
Helium is a monoatomic gas
Helium is unreactive
Which compound has the highest number of oxygen atoms when written as formulae?
Iron (III) oxide
Copper (II) oxide
Calcium oxide
Potassium oxide
3.2g of sulphur is burnt in oxygen to form 8.0g of oxide of sulphur.
What is the empirical formula of the compound?
[RAM: S = 32; O =16]
SO2
S2O
SO3
S2O3
Food is cut into smaller pieces to shorten the cooking time. Which factor is involved in the above situation?
Total surface area
Presence of catalyst
Concentration
Pressure
