Try this as often as you like. You will get a different set of questions each time you attempt this quiz.
Which three of the following statements about crystals are correct?
The father and son team of William Henry Bragg and Lawrence Bragg won the Nobel Prize in Physics in 1915 for
Using X-ray scattering to determine the internal structure of particles in crystals
discovering penicillin
working out the structure of haemoglobin
determining the crystal structure of vitamin B-12
Select the three ionic crystals from this list:
Which three of the following may be classified as a molecular crystal?
Which one of the following statements best describes a covalent macromolecular crystal?
Very hard substance with high melting point, does not conduct electricity and is insoluble in polar and non-polar solvents.
Good conductor of electricity, and insoluble in polar and non-polar solvents.
Soft with a low melting point, does not conduct electricity.
Hard and brittle substance with a high melting point, conducts electricity when molten or dissolved in solution, soluble in polar solvents.
Born in 1910, this scientist is credited with using X-ray crystallography to determine the structures of cholesterol, penicillin and vitamin B-12.
Dorothy Hodgkin
Marie Curie
Linda Buck
Irène Joliot-Curie
When water freezes, it forms a molecular crystal. The binding force between the molecules in this crystal are hydrogen bonds. Select whether this statement is TRUE or FALSE.
TRUE
FALSE
Which one of the following four structures is that for buckminsterfullerine?
Which one of the following is not a property of an ionic crystal?
They do not conduct electricity
They have high melting points
They are soluble in polar solvents
They conduct when molten or in solution
A molecule made up of a large number of repeating units is called a
polymer
monomer
primer
dimer
Polythene is made from the monomer called
ethene
styrene
propene
tetrafluoroethane
Karl Zeigler's research into organometallic compounds made possible the industrial production of which polymer?
polythene
PVC
polythene
polypropene
There are three known covalent macromolecular crystals, each made entirely of carbon atoms. Which of the following statements is incorrect?
The forces between the atoms in diamond are weak Van der Waal forces.
The forces in graphite consist of covalent bonds and Van der Waal forces.
Graphite is used in golf clubs and in pencils.
Diamond is the hardest known natural substance.
The three types of crystal are diamond, buckminsterfullerine and graphite.
Select the three correct statements from the following:
The process whereby small molecules called monomers combine to form much larger molecules is known as addition polymerisation. Polytetrafluoroethane (PTFE) is one such polymer formed by this process. Which one of the following statements is not correct?
PTFE goes by the brand name Teflon and is used as a substitute for wool.
Plumbers tape, non-stick frying pans and some medical body parts are made using PTFE.
The equation for how polytetrafluoroethane is produced from its monomers is
In 1938, Roy Plunkett, working for DuPont accidentally discovered polytetrafluoroethane.
Which one of the following is not a property of metals?