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