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.
Definition of hydrocarbons: Hydrocarbons are chemical compounds that are formed from only hydrogen atoms and carbon atoms. Categories of hydrocarbons include: 1  Alkanes - *saturated hydrocarbons, only single bonds. 2  Alkenes - *unsaturated hydrocarbons, include a double bond.3  Alkynes - *unsaturated hydrocarbons, include a triple bond (more advanced topic, included in A-Level Chemistry).ategories of hydrocarbons include: 1  Alkanes - *saturated hydrocarbons, only single bonds. 2  Alkenes - *unsaturated hydrocarbons, include a double bond.