WorksheetsG11 Chemistry S1M1
Total questions: 22
Worksheet time: 25mins
Hydrated copper (II) sulfate is a soluble blue solid. A large crystal of this solid is placed at the bottom of a beaker of water.
the diagram shows the beaker immediately after placing the crystal in it, and after two days.
After two days, the crystal becomes smaller and the liquid near the bottom of the beaker becomes blue.
Which statement explains these observations?
the crystal dissolves
the crystal freezes
the crystal melts
the crystal sublimes
The diagram shows a kettle of boiling water.
As the water vapour cools it turns into droplets of liquid water.
The change of state when water vapour changes into liquid water is described
boiling
condensation
evaporation
sublimation
Some cold water is poured into a conical flask and a bung inserted.
The diagram shows the flask after a few minutes.
What is occurring in the flask?
boiling and condensing
condensing and evaporating
evaporating and freezing
freezing and melting
Matter exists in three states which are solid, liquid and gas. Phase changes occur when matter changes from one state to another.
In which changes do the particles move closer together?
3 and 4
1 and 3
4 only
1 and 2
A student closed the lid tightly on an empty metal container which was used for paint. She heated the container over a Bunsen burner on a low flame for a few moments and observed the sides and top of the container bend outwards slightly.
She then turned off the burner and allowed the container to cool.
Which statement explain her observations?
The heat increased the pressure inside the container
The heat deformed the metal which then bent
The heat made the container reduce in size
More air particles entered the container.
Ionic compounds are formed when metals react with non metals.
Which row correctly describes the electron transfer when an ionic bond is formed and the nature of the bond?
A
B
C
D
Which option correctly describes the relative charges and masses of the subatomic particles?
A
B
C
D
The structure of four particles is described in the table.
What are the correct values for X, Y and Z?
X-4, Y-7, Z-9
X-3, Y-9, Z-9
X-4, Y-9, Z-10
X-3, Y-7, Z-10
The atomic number of element Q is 9 and its mass number is 19. In which group of the Periodic Table should element Q be placed?
Group 0
Group I
Group VII
Group II
The diagram shows the atomic structure of an element.
Which element is it?
Carbon
Beryllium
Oxygen
Boron
Which row correctly describes the number of outer shell electrons and chemical properties of isotopes.
A
B
C
D
Potassium flouride is an ionic compound formed when one atom of potassium bonds with one atom of flourine.
Which row correctly describes the charge and electronic configuration of each ion in the compound?
A
B
C
D
A section of the Periodic Table is shown below.
The electronic structure of elements W, X, Y, and Z are shown in the table.
Which electronic structures are correct?
W - 2,1
X - 2,4
Y - 2,8,2
Z - 2,8
W - 2.1
Y - 2,8,2
X - 2,4
Z - 2,8
Most of the elements of the Periodic Table are metals. Metals can be distinguished from non-metals by differences in their physical properties.
Which row correctly describes a metal?
A
B
C
D
Calcium reacts with fluorine to form calcium fluoride.
Which statement describes what happens to calcium atoms in this reaction?
Calcium ions lose electrons to form positive charges.
Calcium atoms gain 3 electrons to form positive ions.
Calcium ions gain 2 electrons to form positive ions.
Calcium atoms lose 2 electrons to form positive ions.
Lithium and chlorine react together to form lithium chloride. during formation, each lithium atom....1.....one......2.....which is completely.....3......to the chlorine atom.
What words correctly fill gaps 1,2 and 3?
A
B
C
D
Magnesium is a Group II element and chlorine is a Group VII element.
These elements react together to form an ionic compound.
Which row is correct?
A
B
C
D
The electronic structure of atoms X and Y are shown.
X and Y combine by ionic bonding.
What is the formula of the compound produced?
X2Y
X2Y2
X2Y4
XY
A student analysed an ionic compound and a covalent compound using a melting point apparatus. She found the ionic compound had a much higher melting point than the covalent compound.
Which statement explains this observation?
Ionic compounds are formed from metals only
Ionic compounds are formed from nonmetals and nonmetals
There are strong electrostatic forces of attraction in ionic compounds.
There are strong intermolecular forces in ionic compounds.
Carbon dioxide is a simple molecular substance in which the molecules are formed by covalent bonding between one carbon atom and two oxygen atoms.
Which dot and cross diagram below shows the correct outer shell arrangement of electrons in a molecule of carbon dioxide?
A
B
C
D
Dot and cross diagrams for four covalent molecules are shown below.
Which diagram is INCORRECT?
A
B
C
D
Ionic compounds are formed when a metal reacts with a nonmetal.
Which two elements combine to form this kind of compound?
S and T
R and S
Q and R
Q and T
