Chemical Substances
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Elements and Symbols
SubtopicElements and Symbols under Chemical Substances for Grade 6 IGCSE.
Preview questions (no answers)
- 1.
What is the chemical symbol for Lithium?
A.L
B.Li
C.Lt
D.Lm
- 2.
Which property is true for every chemical element?
A.It is a liquid at room temperature
B.It is made of only one type of atom
C.It is a mixture of different gases
D.It is made of two different metals
- 3.
The symbol comes from 'Plumbum'. Which element does it represent?
A.Phosphorus
B.Lead
C.Platinum
D.Potassium
- 4.
The symbol comes from the Latin name 'Ferrum'. Which element is this?
A.Iron
B.Fluorine
C.Francium
D.Lead
- 5.
Some chemical symbols are derived from an element's Latin name rather than its English name. Study the pattern in the flowchart below. Based on this system, what is the correct symbol for the element Antimony?
A.B.C.D. - 6.
Which of the following is the correct chemical symbol for Carbon?
A.B.C.D. - 7.
The symbol represents the element Iron. This symbol is derived from which language?
A.Greek
B.Latin
C.German
D.Arabic
- 8.
What is the total number of atoms represented in the formula for glucose, ?
A.3
B.12
C.18
D.24
- 9.
Which of these statements is TRUE about the symbols of elements?
A.All symbols are the first two letters of the element's name.
B.Symbols always stay the same even if the element's name is translated into different languages.
C.Symbols can be three letters long for all common elements.
D.The first letter of a symbol is always lowercase if there are two letters.
- 10.
Based on the patterns of symbols, which of the following would be the most likely symbol for a newly discovered element named 'Exemplarium'?
A.B.C.D.
Download the worksheet for Chemical Substances - Elements and Symbols to practice offline. It includes additional chapter-level practice questions.
The Periodic Table
SubtopicThe Periodic Table under Chemical Substances for Grade 6 IGCSE.
Preview questions (no answers)
- 1.
What is the chemical symbol for Nickel?
A.N
B.Nk
C.Ni
D.Ne
- 2.
Each element in the Periodic Table has its own unique...
A.Atomic number
B.Number of letters in its name
C.Group number
D.State of matter
- 3.
The symbol represents which element?
A.Boron
B.Beryllium
C.Barium
D.Bromine
- 4.
Elements that are shiny, hard, and conduct electricity well are usually found on which part of the Periodic Table?
A.Right side
B.Left side
C.Only the top row
D.Nowhere
- 5.
Magnesium () and Calcium () are both found in which group of the Periodic Table?
A.Group 1
B.Group 2
C.Group 17
D.Group 18
- 6.
What is the symbol for the element Silicon?
A.B.C.D. - 7.
The modern Periodic Table is organized in order of increasing...?
A.Atomic mass
B.Density
C.Atomic number
D.Boiling point
- 8.
In a neutral atom, which two subatomic particles must always be equal in number?
A.Protons and Neutrons
B.Protons and Electrons
C.Neutrons and Electrons
D.Protons and Nuclei
- 9.
Which of the following groups contains elements that are mostly used to make colored compounds and jewelry?
A.Group 1
B.Group 17
C.The Transition Metals
D.Group 18
- 10.
What is the reason that Group 1 metals are usually stored under oil?
A.To prevent them from evaporating.
B.To keep them from reacting with oxygen and water vapor in the air.
C.To make them easier to cut.
D.To stop them from becoming radioactive.
Download the worksheet for Chemical Substances - The Periodic Table to practice offline. It includes additional chapter-level practice questions.
Compounds and Mixtures
SubtopicCompounds and Mixtures under Chemical Substances for Grade 6 IGCSE.
Preview questions (no answers)
- 1.
In a mixture of peas and carrots, the components:
A.Lose their original flavor
B.Chemically bond together
C.Keep their own properties
D.Form a new substance
- 2.
Which substance is an element?
A.Water
B.Salt
C.Iron
D.Sugar
- 3.
Which of the following can be separated by using a magnet?
A.Salt and sugar
B.Steel paperclips and plastic beads
C.Sand and water
D.Gold and silver
- 4.
What happens when you add more solvent to a concentrated solution?
A.It becomes more concentrated
B.It becomes dilute
C.It becomes a solid
D.It becomes a compound
- 5.
Which element is common to both the compound 'Calcium Carbonate' () and the compound 'Sulfur Dioxide' ()?
A.Calcium
B.Carbon
C.Sulfur
D.Oxygen
- 6.
Which of these diagrams represents the correct flow for simple distillation?
A.Liquid -> Gas -> Solid
B.Liquid -> Heat -> Vapor -> Cooling -> Liquid
C.Solid -> Liquid -> Filter -> Solid
D.Gas -> Solid -> Heat -> Liquid
- 7.
How do the melting points of a pure substance and a mixture typically differ?
A.A pure substance melts over a range of temperatures; a mixture has a sharp melting point
B.A pure substance has a sharp melting point; a mixture melts over a range of temperatures
C.Both have the same sharp melting point
D.Mixtures do not have melting points
- 8.
A student is asked to classify a sample of brass. Which is the correct classification and why?
A.Compound - because it is made of copper and zinc atoms.
B.Element - because it is a metal.
C.Mixture - because the proportions of copper and zinc can vary.
D.Pure substance - because it looks the same throughout.
- 9.
What is the main reason why we can use a magnet to separate iron from a mixture of iron and sulfur, but not from the compound iron sulfide?
A.The sulfur in the compound is also magnetic and cancels out the iron.
B.The iron atoms in the compound have lost their original physical properties through bonding.
C.The compound is too heavy for the magnet to lift.
D.The iron sulfide has been melted into a liquid.
- 10.
Which of the following statements about atoms in a compound is correct?
A.They are mixed together but not touching.
B.They are held together by strong chemical bonds.
C.They can be separated by spinning the compound in a centrifuge.
D.They always occur in a ratio.
Download the worksheet for Chemical Substances - Compounds and Mixtures to practice offline. It includes additional chapter-level practice questions.
Separating Mixtures (Filtration, Distillation, Chromatography)
SubtopicSeparating Mixtures (Filtration, Distillation, Chromatography) under Chemical Substances for Grade 6 IGCSE.
Preview questions (no answers)
- 1.
What is the term for the liquid that has passed through the filter paper?
A.Solute
B.Distillate
C.Filtrate
D.Residue
- 2.
If you want to recover the water from a sugar-water solution, why is distillation better than just evaporation in an open dish?
A.Distillation is faster
B.Distillation collects the water vapor and turns it back to liquid
C.Evaporation ruins the sugar
D.Distillation makes the water taste sweet
- 3.
What does 'insoluble' mean?
A.It dissolves easily
B.It cannot be seen
C.It does not dissolve in a liquid
D.It is very heavy
- 4.
Which separation method is best for removing dust from the air in a vacuum cleaner?
A.Distillation
B.Chromatography
C.Filtration
D.Evaporation
- 5.
Which of the following describes a 'pure' substance in a scientific sense?
A.A liquid that is clear and see-through
B.A material that consists of only one type of particle
C.Anything that comes directly from nature
D.A mixture that has been filtered once
- 6.
If a dye travels 8 cm and the solvent travels 10 cm, what is the value of the dye?
A.1.25
B.0.8
C.18
D.2
- 7.
Why is it necessary to have a continuous flow of cold water in a Liebig condenser?
A.To keep the condenser cool so the vapor can lose heat and condense
B.To wash away any impurities in the distillate
C.To provide the pressure needed to move the vapor
D.To prevent the boiling flask from exploding
- 8.
Which of these is a homogeneous mixture that can be separated into its components using distillation?
A.Saltwater
B.Oil and water
C.Sand and gravel
D.Sulfur and iron filings
- 9.
If a substance is very soluble in the solvent but also has a very strong attraction to the chromatography paper, how will it likely move?
A.It will move to the very top with the solvent front.
B.It will stay at the baseline.
C.It will move to an intermediate position based on the balance of the two forces.
D.It will disappear as it reacts with the paper.
- 10.
When separating a mixture of sawdust and sugar, what is the most important first step?
A.Filtering the dry mixture.
B.Heating the mixture to melt the sugar.
C.Adding a solvent (like water) that dissolves only the sugar.
D.Using a magnet to remove the sawdust.
Download the worksheet for Chemical Substances - Separating Mixtures (Filtration, Distillation, Chromatography) to practice offline. It includes additional chapter-level practice questions.