S3 Exp Science Chem Bridging 2024 #02

Quiz by Boh Peng

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Q 1/20
Score 0
Bromine is a liquid at 20 °C.

What is the melting point and boiling point for bromine?
29
A
B
C
D

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20 questions

Show answers

Q1
Bromine is a liquid at 20 °C.

What is the melting point and boiling point for bromine?
A
B
C
D
30s
Q2
An atom of potassium is represented as K.

Which row shows the number of protons, neutrons and electrons in the atom?
A
B
C
D
30s
Q3
Sodium chloride is an ionic compound.
Which statement about sodium chloride is not correct?
Sodium ions and chloride ions are oppositely charged.
Sodium chloride has a high melting point.
Sodium chloride solid conducts electricity.
Sodium chloride exists as a lattice.
30s
Q4
Iron(III) sulfate is composed of Fe³⁺ and SO₄^2–ions.

Which values of x and y in Fe_x(SO₄)_ygive the correct formula of iron(III) sulfate?
A
B
C
D
30s
Q5
Which diagram shows the arrangement of the atoms in stainless steel?
30s
Q6
30s
Q7
Four elements have the following electronic configurations.

W         2.8.1
X          2.8.2
Y          2.8.5
Z          2.8.8

Which statement is correct?
All four elements are in the same group of the Periodic Table.
All four elements are in the same period of the Periodic Table.
W is a metal but X, Y and Z are non-metals.
X is a metal but W, Y and Z are non-metals.
30s
Q8
The diagrams represent different arrangement of atoms.

Which diagram represents an alloy?
30s
Q9
The nucleon number of an isotope of bromine is 81.
How many protons, neutrons and electrons are present in an atom of this isotope?
A
B
C
D
30s
Q10
Why does molten sodium chloride conduct electricity?
An electron is completely transferred from sodium to chlorine.
Electrons in sodium chloride are free to move.
Sodium ions are strongly attracted to the chloride ions.
The sodium ions and the chloride ions are free to move.
30s
Q11
An element X forms an ion X^3–.
Which group of the Periodic Table is this element found in?
Group 1
Group 13
Group 15
Group 17
30s
Q12
Which substance represents a metal?
A
B
C
D
30s
Q13
The diagrams show the electronic structures of four elements.
Which elements are metals?
1and 2
1and 3
2and 4
3and 4
30s
Q14
The particles in substance Zare widely spaced and able to move freely.
Z changes to state in which the particles are in contact but still able to move freely.
What is this change called?
condensation
evaporation
freezing
melting
30s
Q15
The nucleon number and proton number of an atom of X and an atom of Y are shown.
Which statement about X and Y is correct?
An atom of X has fewer electrons than an atom of Y.
An atom of X has fewer neutrons than an atom of Y.
X is above Y in the same group of the Periodic Table.
X is in the same period in the Periodic Table as Y.
30s