Physical Science Exam Questions Answered Correctly Latest Update 2024 (Already Passed)

Physical Science Exam Questions Answered Correctly Latest Update 2024 (Already Passed) The prefix n- before an alkane means a normal, straight-chain hydrocarbon. - Answers True The compound CH3OCH3 and C2H5OH are isomers. - Answers True Crude oil refineries were originally built to refine petroleum to obtain gasoline. - Answers False Gasoline made primarily of straight-chain hydrocarbons has a low octane rating. - Answers True Alcohols have the carboxyl functional group -COOH. - Answers False Formic acid is the acid that forms in muscle tissue during anaerobic metabolism of carbohydrates, causing sores and fatigue - Answers False Esters give flowers and fruits their characteristic odor and taste - Answers True Proteins are polypeptides formed by the linkage of many amino acids - Answers True When fats are hydrogenated, liquids oils are produced - Answers False Hydrocarbons with single carbon-to-carbon bonds are known as A. Alkanes B. Alkenes C. Alkynes D. Aromatic hydrocarbons - Answers A. Alkanes The R in R-COOH or R-C=O stands for A. a reactive atom B. a separate functional group C. any hydrocarbon group D. a rigid part of the molecule - Answers D. any hydrocarbon group To which category does the molecule below belong? A. alkanes B. alkenes C. alkynes D. aromatic hydrocarbons - Answers B. alkenes Sucrose is an example of a A. monosaccharide B. disaccharide C. polysaccharide D. fruit sugar - Answers B. disaccharide An alkane with 3 carbon atoms would have how many hydrogen atoms in the molecule? A. 4 B. 6 C. 8 D. 10 - Answers C. 8 Ethylene is a A. gas used to ripen fruit B. a monomer used in making plastics C. an unsaturated hydrocarbon D. All of the above - Answers D. All of the above Organic compounds with two OH groups per molecule are called A. alcohol B. ethanol C. glycerin D. glycol - Answers D. glycol Compounds with the general structural formula RCOOH are known as A. esters B. carboxylic acids C. aldehydes D. fats - Answers B. carboxylic acids What is the number of bonds between the carbon atoms in C2H2? A. 4 B. 3 C. 2 D. 1 - Answers B. 3 Porpanol and ISO-propanol have A. the same physical and chemical properties B. the same physical, but different chemical properties C. different physical, but the same chemical properties D. different physical and chemical properties - Answers C. different physical, but the same chemical properties Starch is a polymer formed by the linking of many A. saccharides B. amino acids C. triglycerides D. peptides - Answers A. saccharides What is ethanol converted into when wine "goes bad"? A. CH3COOH B. CH3OCH3 C. CH3CH2OH D. CH3OH - Answers A.CH3COOH Organic compounds responsible for flavors in fruits and scent of flowers a A. esters B. ethers C. alcohols D. ketones - Answers A. esters Sugars, starches and cellulose belong to the class of A. polymers B. triglycerides C. carbohydrates D. carboxylic acids - Answers C. carbohydrates The site of chemical reaction on an organic molecule is usually A. a functional group B. a multiple bond C. a lone pair of electrons D. All of the above - Answers D. All of the above The various compounds of crude oil are separated in a refinery based on differences in A. density B. melting point C. boiling point D. solubility - Answers C. boiling point Molecules with the general structural formula pictured below belong to the class of A. carboxylic acids B. unsaturated hydrocarbons C. ether D. None of the above - Answers D. None of the above What would paint thinner, a petroleum distillate, most likely contains? A. C2H4 B. C5H12 C. C17H34 D. C40H84 - Answers C. C17H34