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Ionic Chemistry - Test 1

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1. The type of bonding in a diamond crystal is

    A. ionic
    B. molecular
    C. covalent
    D. metallic


2. Of the three types of bonds, a single bond between atoms is the:

    A. shortest and strongest
    B. shortest and weakest
    C. longest and strongest
    D. longest and weakest


3. Covalent bonds differ from ionic bonds in that covalent bonds:

    A. cannot dissociate to form ions
    B. are more stable than ionic bonds
    C. are directed equally in all directions
    D. are directed geometrically in space


4. A piece of iron is hammered flat on an anvil. As a result the iron is:

    A. harder
    B. softer
    C. less able to conduct electricity
    D. better able to conduct electricity


5. Ionic particles:

    A. are present only in water solutions
    B. may exist in crystalline solids
    C. are present in covalent gases
    D. are neutral molecules


6. Hydrogen bonding in water is due to the presence of:

    A. electrons in nonbonding orbitals
    B. the 104.7 degree bond angle
    C. a linear structure
    D. excess hydrogen atoms


7. One would expect a high hydration energy of an ion with:

    A. high charge and small radius
    B. high charge and large radius
    C. low charge and small radius
    D. low charge and large radius


8. One would expect a very high melting point for a:

    A. molecular solid
    B. metallic solid
    C. ionic solid
    D. covalent solid


9. Ionic crystals are brittle because distortion of the crystal lattice produces:

    A. a flow of the electron gas
    B. ionization of some atoms
    C. interionic attractions
    D. interionic repulsions


10. The fact that carbon dioxide has no dipole moment indicates that it is:

    A. covalently bonded
    B. ionically bonded
    C. angular
    D. linear and symmetrical












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