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.
Organic compounds that contain only carbon and hydrogen are hydrocarbons, which differ from one another by the number of carbon and hydrogen atoms they contain. The simplest hydrocarbon is methane, CH 4, with only one carbon per molecule.Methane is the main component of natural gas. The hydrocarbon octane, C 8 H 18, has eight carbons per molecule and is a component of gasoline. The hydrocarbon polyethylene contains hundreds of carbon and hydrogen atoms per molecule.rganic compounds that contain only carbon and hydrogen are hydrocarbons, which differ from one another by the number of carbon and hydrogen atoms they contain. The simplest hydrocarbon is methane, CH 4, with only one carbon per molecule.