Baird Chem in Your life Chapter 06
1. How would the compound CH3OCH2CH3 be classified?
a. as an ether
b. as an ester
c. as an alcohol
d. as an aldehyde
a: As an ether because of two carbon chains attached to an oxygen atom.
2. Which of the following would be classified as an alcohol?
a. C3H7OH
b. CH3OC3H7
c. CH3CH2COOH
d. CH2CH=O
a: It is an alcohol because of the -OH functional group.
3. What is the chemical formula for grain alcohol?
a. C2H5OH
b. CH3OH
c. CH3CH2COOH
d. C3H7OH
a: Grain alcohol is the compound used in alcoholic beverages. See page 211.
4. What is the common name for methyl alcohol?
a. wood alcohol
b. rubber alcohol
c. grain alcohol
d. denatured alcohol
a: See page 211.
5. What is the proof of an alcoholic beverage that contains 40% alcohol?
a. 80
b. 40
c. 20
d. 60
a: A proof is equal to twice the alcohol content, therefore 40 × 2 = 80 proof.
6. What is the percentage of alcohol in a beverage that is 12 proof?
a. 6
b. 8
c. 12
d. 24
a: A percentage is equal to half the proof, therefore, ½ × 12 = 6.
7. What is the LD50 for ethanol?
a. 10 g/kg body weight
b. 2.5/kg body weight
c. 5 g/kg body weight
d. 1 g/kg body weight
a: See the description of lethal doseon page 215.
8. How much 1-propanol would a person having a mass of 70 kg need to consume to be lethal if the LD50 is equal to 2.0 g/kg ?
a. 140 g
b. 50 g
c. 70 g
d. 35 g
a: If the weight is 70 kg × LD = 2.0/kg, which equals 140.
9. Ethanol, drinking alcohol, is usually produced by ______.
a. fermentation and distillation
b. distillation
c. fermentation
d. fractional distillation
a: See page 213 for description.
10. What is the appropriate E value for a gasohol that contains 20% ethanol?
a. E20
b. E2
c. E20
d. E40
a: The subscript designates the alcohol content.
11. What is required for hydrogen bonding to occur?
a. It requires a hydrogen atom and a nearby atom with a negative charge and at least one pair of nonbonding electrons.
b. It must occur between hydrogen atoms and the negative charge of another particle.
c. It requires a hydrogen atom and a nearby atom with a partial negative charge.
d. It can only occur between identical atoms.
a: Hydrogen bonding requires a hydrogen atom which is positive when bonded to an atom with a greater electronegativity and an atom which also has a greater electronegativity than the hydrogen atom.
12. What is the name of an alcohol in which a benzene ring has an alcohol group attached?
a. phenol
b. ketone
c. hexanol
d. glycol
a: A phenol is a benzene ring with an -OH attached.
13. What is the name of the functional group that has the following structure: a C and H attached to a carbonyl group (C=O)?
a. aldehyde
b. ester
c. ether
d. phenol
a: An aldehyde has at least one hydrogen atom attached to a carbon with a double-bonded oxygen.
14. What is the name of the functional group that has the following structure: two Cs attached to a carbonyl group (C = O)?
a. ketone
b. ether
c. aldehyde
d. ester
a: A ketone has two carbons attached to a (carbonyl) carbon atom with a double-bonded oxygen.
15. What is the chemical name for the common organic acid vinegar, which is used as a food supplement?
a. acetic
b. formic
c. caproic
d. oxalic
a: The chemical name for vinegar is acetic acid.