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CONTINOUS ASSESSMEN FOR S.S.1 FIRST TERM 26/27 - Quiz
Contributed by: EMMANUEL
  • 1. Isoelectronic with Argon (2,8,8)
    Na+
A) Mg2+
B) Ca2+
C) O2
D) Al3+
E) cl-
  • 2. Which technique is best for separating a
    mixture of iodine and sand?
A) centrifugation
B) Decantation
C) Filtration
D) Distillation
E) Sublimation
  • 3. Two miscible liquids with boiling points 78°C
    and 100°C are best separated by:
A) Filtration
B) Separating funnel
C) Chromatography
D) Fractional distillation
E) Simple distillation
  • 4. An ion X2+ has 10 electrons and mass number
    24. Its atomic number is:
A) 12
B) 14
C) 10
D) 16
E) 8
  • 5. The difference between mass number and
    atomic number gives:
A) Number of neutrons
B) Number of shells
C) No symbol
D) Number of protons
E) Charge of ion
  • 6. The subatomic particle with zero electric
    charge is the:
A) Energy levels
B) Positron
C) Electron
D) Proton
E) Neutron
  • 7. Air is classified as a mixture because its
    constituent gases:
A) All of the above
B) Can be separated physically
C) No chemical symbol
D) Retain individual properties
E) Can vary in proportion
  • 8. The components of a compound can only be
    separated by:
A) Adding soap
B) Chemical or electrochemical reactions
C) Filtration
D) Magnetization
E) Physical methods
  • 9. An element with atomic number Z = 17
    (Chlorine) has the configuration:
A) 2, 8,1
B) 2, 8, 7
C) 2, 8, 6
D) 2, 8, 8
E) 2, 7, 8
  • 10. . How many valence electrons are present in
    Calcium (Z = 20)?
A) 4
B) 8
C) 2
D) 1
E) 3
  • 11. The maximum number of electrons in the M
    shell (n=3) is:
A) 8
B) 10
C) 32
D) 88
E) 18
  • 12. Freezing of water to ice involves:
A) Liberation of energy (Physical)
B) work of God
C) Permanent mass gain
D) Chemical decomposition
E) Formation of new chemical bonds
  • 13. Decaying of organic matter in a compost heap
    is a:
A) Non-chemical process
B) Physical change
C) Reversible physical process
D) None of the answer
E) Chemical change
  • 14. An atom with atomic number 11 and mass number 23 has how many neutrons?
A) 19
B) 34
C) 11
D) 23
E) 12
  • 15. 26.
    What is the relative molecular mass of calcium carbonate, CaCO3? [Ca = 40, C = 12, O = 16]
A) 100
B) 69
C) 50
D) 120
E) 68
  • 16. 31.
    What is the percentage by mass of oxygen in water (H2O)? [H = 1, O = 16]
A) 88.9%
B) 34.8%
C) 5.6%
D) 11.1%
E) 33.3%
  • 17. 27.
    A compound contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. Its empirical formula is: [C=12, H=1, O=16]
A) CH3O
B) C6H6
C) CHO
D) C2H4O
E) CH2O
  • 18. 35.
    What is the oxidation number of chlorine in HClO3?
A) +7
B) +1
C) =4
D) +5
E) +3
  • 19. 31.
    What is the percentage by mass of hydrogen in water
A) 17.1%
B) 5.6%
C) 88.9%
D) 33.3%
E) 11.1%
  • 20. 25.
    The symbol for the element gold is:
A) Ag
B) Gd
C) Au
D) Pd
E) Go
  • 21. 10.
    The fundamental particles present in the nucleus of an atom are:
A) Electrons
B) Neutrons
C) Protons and electrons
D) Electrons and Neutron
E) Protons and neutrons
  • 22. 11.
    The atomic number of an element is equal to the number of:
A) Protons in the nucleus
B) Valence electrons
C) Mass Number
D) Nucleons
E) Neutrons in the nucleus
  • 23. The conversion of a solid directly into a gas without passing through the liquid state is called:
A) Condensation
B) Melting
C) Boiling
D) Evaporation
E) Sublimation
  • 24. Element X has two isotopes: 60% 10X and 40%
    11X. Calculate RAM:
A) 10.8
B) 11.5
C) 10.5
D) 10.4
E) 10.2
  • 25. The continuous region around a nucleus
    where electron probability is high is an
A) None
B) Orbital
C) Axis
D) Orbit
E) Energy shell
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