WorksheetsCA1 Term 1 2021 Chemistry MCQ
Total questions: 20
Worksheet time: 21mins
The changes that occur when a substance changes state are shown above.
Which process, W, X,Y or Z, is occurring in the following four situations?
W. Butter melts on a warm day.
X. Water condenses on a cold surface.
Y. The volume of liquid ethanol in an open beaker reduces.
Z. Ice forms inside a freezer.
The particles of a substance gain energy and change from a regular ordered structure to a disordered structure with large distances between the particles.
Which change of state is described?
boiling
evaporation
melting
sublimation
Which statement is an example of diffusion?
A kitchen towel soaks up some spilt milk.
Ice cream melts in a warm room.
Pollen from flowers is blown by the wind.
The smell of cooking spreads through a house.
Diagrams X, Y and Z represent the three states of matter.
X to Y
Y to Z
Z to X
Z to Y
The four pieces of apparatus shown below are used in chemical experiments.
Which statement about the apparatus is correct?
The burette measures the volume of liquid added in a titration.
The measuring cylinder measures the mass of a substance used in an experiment.
The pipette measures the volume of gas given off in a reaction.
The thermometer measures the density of a solution.
Alcohol and water are completely miscible (mixed completely). This means when mixed together they form only one liquid layer.
Which method is used to separate alcohol from water?
crystallisation
filtration
fractional distillation
precipitation
A student uses the apparatus shown in the diagram below to measure the volume of carbon dioxide gas made when different masses of marble chips are added to 25 cm3 of dilute hydrochloric acid.
Which other items of apparatus are needed?
funnel and balance
funnel and stopwatch
measuring cylinder and balance
measuring cylinder and stopwatch
Chromatography is a technique used to separate coloured dyes.
Which dye has an Rf value of 0.7?
(a)
Gases are separated from liquid air by fractional distillation.
The boiling points of four gases are shown.
Which gas is both monatomic and a liquid at –200oC?
(a)
A mixture is separated using the apparatus shown.
What is the mixture?
aqueous copper chloride and copper
aqueous copper chloride and sodium chloride
ethane and methane
ethanol and water
X and Y are both atoms.
X and Y have the same chemical properties as each other.
Which row describes the atomic structures of X and Y?
(a)
An element, X, can be represented above:
Which statement is correct?
The number of protons in an atom of X is a.
The exact position of X in the Periodic Table can be found from a.
The relative atomic mass of X is b.
The total number of electrons in one atom of X is b.
Q+ is an ion of element Q.
What has the highest value in the ion?
the nucleon number
the number of electrons
the number of neutrons
the proton number
The diagrams show four particles.
Which two diagrams show atoms that are isotopes of each other.
1 and 2
1 and 3
2 and 3
2 and 4
Chlorine exists as two common isotopes, 35Cl and 37Cl.
Information about these two isotopes is shown.
Which statement explains why the two isotopes are of the same element?
Both have the same number of electron shells.
Both have the same number of protons.
Both have 7 outer shell electrons.
37Cl has 2 more neutrons than 35Cl.
An inert gas R is used to fill weather balloons.
Which descriptions of R are correct?
(a)
Why is argon gas used to fill electric lamps?
It conducts electricity.
It glows when heated.
It is less dense than air.
It is not reactive.
Which information about an element can be used to predict its chemical properties?
boiling point
density
melting point
position in the Periodic Table
Element X is a non-metal.
In which position of the periodic table could element X be found?
at the bottom of Group I
at the top of Group 0
at the top of Group I
in the transition elements
An element X has a proton number of 10. The next element in the periodic table is an element Y.
Which statement is correct?
Element Y has one more electron in its outer shell than element X.
Element Y has more one electron shell than element X.
Element Y is in the same group of the periodic table as element X.
Element Y is in the same period of the periodic table as element X.
