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Topic 4: Chemical Bonding and Structure - Mock Prep 2023

Quiz by arnel

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30 questions
Show answers
  • Q1

    1) What is the formula for the compound formed by calcium and nitrogen?

    Ca3N2

    CaN

    Ca2N3

    Ca2N

    60s
  • Q2

    2) Element X is in group 2, and element Y in group 7, of the periodic table. Which ions will be present in the compound formed when X and Y react together?

    X2+ and Y–

    X+ and Y2-

    X+ and Y–

    X2- and Y+

    60s
  • Q3

    3) Based on electronegativity values, which bond is the most polar?

    C―O

    N―O

    O―F

    B―C

    60s
  • Q4

    4) What is the Lewis (electron dot) structure for sulfur dioxide?

    Answer Image
    Answer Image
    Answer Image
    Answer Image
    60s
  • Q5

    5) Which substance is most soluble in water (in mol dm–3) at 298 K?

    CH3CH3

    CH3CH2OH

    CH3OCH3

    CH3CH2CH2CH2OH

    60s
  • Q6

    6) According to VSEPR theory, repulsion between electron pairs in a valence shell decreases in the order

    lone pair-lone pair > bond pair-bond pair > bond pair-lone pair

    bond pair-bond pair > lone pair-lone pair > lone pair-bond pair

    lone pair-lone pair > lone pair-bond pair > bond pair-bond pair

    bond pair-bond pair > lone pair-bond pair > lone pair-lone pair

    60s
  • Q7

    7) Which molecule is linear?

    H2S

    CO2

    Cl2O

    SO2

    60s
  • Q8

    8) Why is the boiling point of PH3 lower than that of NH3?

    Vander Waals’ forces are weaker in PH3 than in NH3

    PH3 is not hydrogen bonded whereas NH3 is hydrogen bonded

    PH3 is non-polar whereas NH3 is polar

    The molar mass of PH3 is greater than that of NH3

    60s
  • Q9

    9) Which molecule is non-polar?

    H2CO

    CHCl3

    NF3

    SO3

    60s
  • Q10

    10) What happens when sodium and oxygen combine together?

    Each sodium atom loses one electron.

    Each oxygen atom loses one electron

    Each sodium atom gains one electron

    Each oxygen atom gains one electron

    60s
  • Q11

    11) Which statement is correct about two elements whose atoms form a covalent bond with each other?

    The elements have very different electronegativity values.

    The elements are metals.

    The elements have very low electronegativity values.

    The elements are non-metals.

    60s
  • Q12

    12) Which substance has the lowest electrical conductivity?

    H2 (g)

    Cu (s)

    LiOH (aq)

    Hg (l)

    60s
  • Q13

    13) When the following bond types are listed in decreasing order of strength (strongest first), what is the correct order?

    covalent > van der Waals’ > hydrogen

    covalent > hydrogen > van der Waals’

    hydrogen > covalent > van der Waals’

    vander Waals’ > hydrogen > covalent

    60s
  • Q14

    14) Which statement is true for most ionic compounds?

    They conduct electricity in the solid state

    They contain elements of similar electronegativity

    They are coloured

    They have high melting and boiling points. 

    60s
  • Q15

    15) What is the valence shell electron pair repulsion (VSEPR) theory used to predict?

    The type of bonding in compounds

    The energy levels in an atom

    The electronegativities of elements

    The shapes of molecules and ions

    60s

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