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.
A hydrocarbon is any molecule made up of only hydrogen and carbon. Examples include alkanes, such as methane (CH4), alkenes, such as ethylene (C2H4), alkynes, such as acetylene (C2H2) and aromatic compounds such as benzene (C6H6).Hydrocarbons are the principle combustible components in petroleum, natural gas and coal. hydrocarbon is any molecule made up of only hydrogen and carbon. Examples include alkanes, such as methane (CH4), alkenes, such as ethylene (C2H4), alkynes, such as acetylene (C2H2) and aromatic compounds such as benzene (C6H6).