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Chemistry UTME / JAMB 2008 Matter & Separation Techniques
Choose the correct option from the structure above
A
A
B
B
C
C
D
D
medium Difficulty
Chemistry UTME / JAMB 2008 Matter & Separation Techniques
Use the diagram to answer this question. The gas that can be used to demonstrate the experiment is
Attached Figure / Diagram
Question diagram
A
hydrogen chloride
B
hydrogen sulphide
C
nitrogen(ll) oxide
D
dinitrogen (l) oxide
medium Difficulty
Chemistry UTME / JAMB 2008 Matter & Separation Techniques
Use the diagram to answer this question.The colour of the fountain water is
Attached Figure / Diagram
Question diagram
A
blue
B
orange
C
red
D
yellow
medium Difficulty
Chemistry UTME / JAMB 2008 Matter & Separation Techniques
Choose the correct option from the structure above
Attached Figure / Diagram
Question diagram
A
A
B
B
C
C
D
D
medium Difficulty
Chemistry WAEC / WASSCE 2008 Stoichiometry & Mole Concept
The mass spectrometer can be used to measure mass of
A
an atom
B
an electron
C
a proton
D
a neutron
medium Difficulty
Chemistry WAEC / WASSCE 2008 Atomic Structure and Periodic Table
Find the number of neutrons in an atom represented by 4521X.
A
21
B
24
C
45
D
66
medium Difficulty
Chemistry WAEC / WASSCE 2008 Atomic Structure and Periodic Table
The valence electrons in a chloride ion are [17CI]
A
2p electrons only
B
3s and 3p electrons only
C
3p and 3d electrons only
D
3p electrons only
medium Difficulty
Chemistry WAEC / WASSCE 2008 Atomic Structure and Periodic Table
What is the atomic number of an element whose cation Y+ has the electronic configuration 1s22s22p6?
A
9
B
10
C
11
D
12
medium Difficulty
Chemistry WAEC / WASSCE 2008 Stoichiometry & Mole Concept
Atom \(^{234} _{88} Q\) decay by alpha emission to give an atom R. The atomic number and mass number of atom R are respectively
A
86 and 230
B
87 and 234
C
88 and 233
D
90 and 238
medium Difficulty
Chemistry WAEC / WASSCE 2008 Matter & Separation Techniques
Which of the following statements is not true of halogens?
A
they exist in different physical states
B
they exist as diatomic molecules
C
their ionic radii decrease down the group
D
their melting and bolling points increase down the group
medium Difficulty
Chemistry WAEC / WASSCE 2008 Atomic Structure and Periodic Table
Elements in the same group of the periodic table have
A
the same number of valence electrons
B
the same number of electron shells
C
different chemical behaviour
D
the same atomic size
medium Difficulty
Chemistry WAEC / WASSCE 2008 Atomic Structure and Periodic Table
Consider the following elements and their electronic configurations W: 1s22s2 X: 1s 22s22p6 Y: 1s22s22p63s2 Z: 1s22s22p63s23p2. Which of the elements belong to the same group in the periodic table?
A
W and X only
B
Y and Z only
C
W and Y only
D
W, Y and Z only
medium Difficulty
Chemistry WAEC / WASSCE 2008 Atomic Structure and Periodic Table
Arrange the following elements in order of increasing electron affinity: Br2CI2 I 2 F 2
A
I 2CI2Br2F 2
B
I 2Br2CI2F 2
C
CI2 I 2Br2F 2
D
Br2CI2 I 2 F 2
medium Difficulty
Chemistry WAEC / WASSCE 2008 Stoichiometry & Mole Concept
Water molecules are held together by
A
covalent bond
B
hydrogen bond
C
ionic forces
D
van der Waals forces
medium Difficulty
Chemistry WAEC / WASSCE 2008 Atomic Structure and Periodic Table
The force of attraction between covalent molecules is?
A
electrostatic attraction
B
hydrogen bonding
C
ionic force
D
van der Waals forces
medium Difficulty
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