CHEM1200

Practice Test 1

Note: These questions are representative of the types you can expect on the test. The actual test will be longer, typically between 20-40 questions.
You will need to bring a SCANTRON and pencil to each class test.
Instructions: Select the best answer then click on "get answer" box.


Question 1.Which of the following liquids would make a good solvent for the non-polar substance, iodine, I₂?

a. HCl
b. H₂O
c. CH₃OH
d. NH₃
e. pentane

Question 2. Calculate the molality of a solution containing 14.3 g of NaCl in 42.2 g of water

a. 2.45 x 10^-4 m
b. 5.80 x 10^-4 m
c. 2.45 x 10^-1 m
d. 5.79 m
e. 103 m

Question 3. The solubility of CO₂ gas in water:

a. increases with increasing temperature
b. decreases with decreasing temperature
c. decreases with increasing temperature
d. is not dependent on temperature

Question 4. Calculate the freezing point of a solution made from 22.0 g of octane (C₈H₁₈) dissolved in 148.0.g of benzene. Benzene freezes at 5.50 ^oC and its K_f value is 5.12 ^oC/m

a. - 1.16 ^oC
b. - 0.98 ^oC
c.   6.66 ^oC
d.   12.2 ^oC
e.   5.49 ^oC

Question 5. A solution that contains 55.0 g ascorbic acid (vitamin C) in 250 g of water freezes at - 2.34 ^oC. Calculate the molar mass (g/mol) of the solute.
K_f (water) = 1.86 ^oC/m

a. 1.26
b. 10.9
c. 43.6
d. 175
e. 277

Question 6. Calculate the mole fraction of ethanol (CH₃CH₂OH, molar mass = 46.0 g/mol) in a solution that contains 46 g of ethanol and 64 g of methanol (CH₃OH)

a. 0.33
b. 0.42
c. 0.50
d. 0.67

Question 7. The general formula of an alkane is

a. C_nH_2n
b. C_nH_2n+2
c. C_nH_2n-2
d. C_nH_2n+4
e. C_nH_2n-4

Question 8. Which of the following molecules is unsaturated?

a. C₃H₈
b. CH₃
c. C₅H₁₀
d. CH₄
e. C₄H₁₀

Question 9. How many structural isomers are there of C₄H₁₀?

a. 2
b. 4
c. 6
d. 8
e. 10

Question 10. The following two molecules are examples of what?

CH₃-CH₂-O-CH₂-CH₃      and      CH₃-CH₂-CH₂-CH₂-OH

a. isotpes
b. isomers
c. alcohols
d. carboxylic acids
e. unsaturated hydrocarbons

Question 11. Which of the following is the formula for an ether?

a. CH₃CHO
b. CH₃COCH₃
c. CH₃OCH₃
d. CH₃COOH
e. CH₂=CH2



Question 12. Which type of organic group does not contain a carbonyl group?

a. ethers
a. carboxylic acids
b. ketones
c. aldehydes
d. esters

Question 13. Which is the most likely main product of the reaction of one mole of HCl wth one mole of CH₃-CH₂-CH=CH₂

a. CH₃-CH₂-CH=CHCl
b. CH₃-CH=CH-CH₂Cl
c. CH₃-CH₂-CH₂-CH₃
d. CH₃-CH₂-CH-CH₃
                   |
                  Cl

Question 14. Which is an organic compound containing the -NH₂ group?

a. chloroform
b. citric acid
c. anthracene
d. aniline
e. cresol

Question 15. Which functional group tends to confer acidic properties upon an organic substance?

a. -CHO
b. -CO
c. -CN
d. -COOH
e. -NH₂

Question 16. What is the systematic name for the following compound?
                  Cl
                   |
CH₃-CH₂-C-CH₃
                   |
                  Cl

a. 2-dichlorobutane
b. 2,2-dichlorobutane
c. di-2-chlorobutane
d. di-2,2-dichlorobutane
e. 2-chlorobutane

Question 17. The correct structure for 2,3,3-trimethylpentane is

a.
b.
c.
d.

Question 18. The correct name for the following compound is

a. 1,1-dichloropentane
b. 1,2-dichloropentane
c. 5,5-dichloropentane
d. 4,5-dichloropentane