Perceptum Education
Mid-year Quiz 2024
Secondary 1
Lower Secondary Science
Time: 40 minutes
Name: ______________________________________
Date: ___________________
READ THESE INSTRUCTIONS FIRST
Write in dark blue or black in pen on both sides of the paper.
Do not use staples, paper clips, glue, or correction fluid.
This paper consists of Section A, Section B
Answer all the questions in Section A in the boxes provided on this page. For each question, there are four
possible answers, A, B, C and D. Choose the correct answer and record your choice in the boxes on this
page.
Answer all the questions in Section B in the spaces provided. The intended marks for the questions are
given in the brackets at the end of the question or part question [ ].
You may use a calculator for this examination. The Periodic Table is provided on the last page.
Do not turn over the paper until you are told to do so.
This question paper consists of 12 printed pages including the cover page.
FOR MARKER’S USE
Marks
Max
Awarded
Marks
Section A
10
Section B
30
Total
40
Answers for section A:
Q1
Q2
Q3
Q4
Q5
Q6
Q8
Q9
Q10
Q7
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Section A [10 marks]
Answer ALL questions and record your choice of answer in the box on the cover page.
1
2
Which of the following statements is/are correct about solutions?
I
II
III
IV
A solution is a homogeneous mixture.
A diluted solution contains less solute than a concentrated solution.
A solution does not allow light to pass through.
A solution leaves a residue when filtered.
A
B
C
D
I only
I and II only
II and IV only
III and IV
Which of the following apparatus is used to measure the volume of liquids or solutions to an
accuracy of 0.1cm3?
A
B
C
D
3
Measuring cylinder
Burette
Pipette
Conical flask
Amil bought a tin of paint and some turpentine to dilute the paint, in case it gets thicken and
becomes difficult to flow.
What is the role of turpentine?
A
B
C
D
4
Which situations would demonstrate the physical property of hardness?
A
B
C
D
5
A solute
A solution
A solvent
A suspension
A metal tool scratching a wooden surface.
A rubber band is stretched and return to its original shape.
A spiderweb supporting a large insect without breaking.
Copper metal is bring pulled into wires.
An iron ball of a density of 7.874 g/cm3 was remolded into 5 smaller cubes. There was
excess iron after the remolding which was discarded. What will be the density of one of the
small iron cubes?
A
B
C
The density will be lower than 7.874 g/cm3.
The density will be higher than 7.874 g/cm3.
The density will be 7.874 g/cm3.
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2
D
6
Cannot be determined.
With reference to the Periodic Table, what is the element in period 4, group 7 of the
Periodic Table?
A
B
C
D
Iodine
Astatine
Krypton
Bromine
7
Which model best represents a compound?
8
The substance, buckminsterfullerene was discovered in 1985. It is a perfect sphere with the
formula C60. From this information, what can you deduce about buckminsterfullerene?
A
B
C
D
9
It is a compound made of 60 elements.
It is an element made of 60 atoms.
It is a mixture made of 60 atoms.
It is a mixture made of 60 elements.
The diagram shows parts of simple distillation.
What is the function of substance X?
A
B
C
to increase the temperature
to increase the rate of reaction
to trap impurities in the mixture
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3
D
10
to reduce bumping effect of liquids
In an investigation, two substances, X and Y, of the same mass are dissolved in the same
volume of water. It is found that X dissolves faster than Y.
Which one of the following graphs correctly shows the mass of the substances dissolved
against time in this investigation?
Section B [15 marks]
Answer all the questions in the space provided.
11
Study the four diagrams W, X, Y and Z shown below.
State the diagram that represents each of the mixtures. (you may use each letter
once, more than once or not at all.
(i)
A mixture of elements: _________________________________________ [1]
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12
(ii)
A mixture of elements and compounds: ____________________________ [1]
The figure shows the amount of three solutes, P, Q and R that can dissolve in 50 cm3 of
three different solvents, X, Y and Z, at room temperature.
a)
Besides temperature, name two other factors that can affect how fast a solute
dissolves in a given solvent. [2]
___________________________________________________________________
b)
Joshua’s shirt was accidentally stained with solute P. Which solvent should he
choose to remove the stain most easily? [1]
___________________________________________________________________
c)
State the solute which is likely to form a suspension when mixed with solvent Y. [1]
___________________________________________________________________
d)
Suggest one possible way to increase the solubility of solute R in solvent Z. [1]
___________________________________________________________________
13
A student wants to determine the identity of three substances, X, Y and Z through the
flowchart below. The three substances are food colouring, water and liquid nitrogen.
Based on the flowchart, identify X, Y and Z.
X: _________________________________ [1]
Y: _________________________________ [1]
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Z: _________________________________ [1]
14
There are three types of gold used to make jewellery, 14K gold, 18K gold and 24K gold.
The table shows some information about the three types of gold.
a)
State one physical property of gold which makes it suitable for making jewellery. [1]
___________________________________________________________________
b)
Define what is an element. [1]
___________________________________________________________________
___________________________________________________________________
c)
Alvin has a gold pendant and he wants to find out which type of gold the pendant is
made up of.
(i)
Alvin measured the mass and volume of the pendant and recorded the readings
in the table shown below.
Complete the table below to state the appropriate instrument that Alvin could have
used to measure the mass and volume of the pendant. [2]
(ii)
Calculate the density of the pendant and determine the type of gold the
pendant is made up of.
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Density of pendant: ________________ [2]
Type of gold: _____________________ [1]
A scientist in a food colouring factory carried out paper chromatography to analyse and
identify the colours present in five different dyes A, B, C, D and E. The table below shows
the colours that were present in each of the five dyes.
Figure 15.1 below shows the paper chromatogram from the analysis of the five dyes.
(i)
(ii)
Fig 15.1
Identify the dye by matching their component(s) with the letters on the paper
chromatogram. The first one has been done for you. [4]
Suggest a reason why paper chromatography is a suitable method for identifying
food dyes. [1]
___________________________________________________________________
___________________________________________________________________
(iii)
Explain why the start line must always be above the solvent in a chromatography
set-up. [1]
___________________________________________________________________
___________________________________________________________________
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(iv)
A new dye, Coral, is a mixture of pink, brown and blue. On Fig. 15.1, draw the colour
components of Coral. [1]
16
(a)
Label the following parts of a vernier caliper. [3]
(b)
A shopkeeper wanted to measure the volume of an irregular shaped ring jewelry.
The ring’s size is too big to fit into a measuring cylinder and it can sink in water.
He was given the following apparatus:
electronic balance
measuring tape water
displacement can
measuring cylinder
State the suitable apparatus, physical quantity and steps that the shopkeeper should
take to measure the volume of the ring. [3]
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
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