Chemistry > EXAM > CHEM15 Finals-Answered. 100% Pass Rate. (All)

CHEM15 Finals-Answered. 100% Pass Rate.

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CHEM15 Finals-answered Question 2 Question text Which statement concerning thiols is correct? Select one: a. Thiols are more soluble in water than are alcohols of similar size. ...

CHEM15 Finals-answered Question 2 Question text Which statement concerning thiols is correct? Select one: a. Thiols are more soluble in water than are alcohols of similar size. b. The thiols are of lower polarity than disulfides of similar size. c. A thiol is much less polar than is the parent hydrocarbon. d. The larger the thiol, the lower the solubility in water. MEK is the abbreviation for methyl ethyl ketone. It is the common name for a solvent that is sold at hardware and automotive parts stores. Its structure is: What is the IUPAC name for MEK? Select one: a. butanal b. butanone c. 2-butanol d. methyl propanal Question 4 Question text The structural similarity of acetals and ethers is the presence of ___. Select one: a. C—O—C b. a carboxylic carbon c. C—O—H d. CHO Question 6 Question text Which of the following is formed when an aldehyde or a ketone undergoes an addition reaction with an alcohol molecule in the presence of an acid catalyst? Select one: a. ester b. ether c. hemiacetal d. alkene Question 7 The name for: is ___. Select one: a. ethanol b. dimethyl ketone c. dimethyl aldehyde d. ethanal Question 8 Which of the following will be oxidized by Benedict’s reagent? Select one: a. ethanol b. ethanal c. acetic acid d. ethane Question 9 Question text Benedict’s solution is added to a test tube containing ethanal. Which of the following statements is correct? Select one: a. ethanal is oxidized to ethanol b. ethanal is reduced to ethanol c. ethanal is oxidized to ethanoate ion d. ethanal is oxidized to propanone Question 11 Oxidation of a secondary alcohol results in the formation of a(n) ___. Select one: a. tertiary alcohol b. acid c. aldehyde d. ketone Question 14 Shown here is the structure of acetone, a common laboratory solvent: Another name for acetone is ___. Select one: a. dimethyl aldehyde b. propanone c. methyl ethyl aldehyde d. propanal Question 19 What is the expected product when acetaldehyde and hydrogen react in the presence of platinum? Select one: a. ethanol b. ethanal c. ethanoic acid d. propane Question 21 Question text Ethanol is miscible in water, while 1-pentanol has a solubility of just 2.2g/100 mL because solubility in water decreases with increasing alcohol size. Select one: True False Question 23 Question text The reduction of a ketone produces a 2° alcohol. Select one: True False Question 25 Each of these is based on the propane molecule. Which is NOT capable of forming hydrogen bonds to another molecule of the same type? Select one: a. 1-propanol b. 1-propanethiol c. 2-propanol d. propanoic acid Question 26 Not yet answered Chose the incorrect statement referring to starches. Select one: a. Starches are produced by plants for the storage of energy. b. Starch is composed of two homopolysaccharides—amylose and amylopectin. c. Starch forms helical shapes, rather than forming up in sheets of polysaccharides. d. Starches are the structural material of animal cells. Question 28 Question text Maltose is hydrolyzed by the enzyme maltase into two molecules of glucose. Maltose is classified as a ___. Select one: a. onosaccharide b. disaccharide c. cellulose d. polysaccharide Question 29 Question text -D-glucose and -D-glucose are anomers. Select one: True False

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