Chapter 7 - How to Conduct Pretesting. The systematic checking or pretesting of a questionnaire is central to planning a good survey. As mentioned earlier in this series, the survey sponsors should play a major role in developing the data-collection instruments being proposed-including any testing being done.
Question and answer. The simplest unsaturated hydrocarbon is methane, a one-carbon molecule. Please select the best answer from the choices provided T F. The simplest unsaturated hydrocarbon is methane, a one-carbon molecule.This is false. mixture is different from a compound because each substance in a mixture a. retains its own properties. c. forms an ion. b. changes its electric charge. d. changes from a solid to a liquid.
An organic molecule made of nothing more than hydrogen and carbon  atoms. A hydrocarbon contains only hydrogen atoms and carbon atoms. There are a large number of hydrocarbons, but the simplest is CH4 (methane).One important thing about hydrocarbons is that they are all flammable.A hydrocarbon is a molecule that consists primarily of hydrogen and carbon. Other atoms may be present in place of the hydrogen atoms in some places. Examples of hydrocarbo â¦ ns include Methane (CH4), toluene.