Chemistry Practice Test, Che102 Practice Final Exam

50 Questions | By Gmpraetorius | Updated: Mar 20, 2022 | Attempts: 205

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Chemistry practice Test

Questions and Answers

1.

The difference between an alkane and alkene is
- A.
  
  Alkanes are bigger
- B.
  
  Alkenes contain at least one double bond
- C.
  
  Alkanes contain at least one double bond
- D.
  
  Alkenes are bigger
2.

The best test to differentiate between an alkane and an aromatic hydrocarbon is
- A.
  
  Combustion
- B.
  
  Reaction with bromine
- C.
  
  Solubility in ligroin
- D.
  
  Solubility in water
3.

A hydrocarbon is burned on a watchglass. There is no black smoke observed and nothing remaining on the watchglass. Which type of hydrocarbon is this?
- A.
  
  Alkane
- B.
  
  Alkene
- C.
  
  Aromatic
- D.
  
  Either an alkane or aromatic
4.

When an alkene reacts with bromine, Br₂, the type of reaction occurring is called
- A.
  
  Combustion
- B.
  
  Addition
- C.
  
  Hydrolysis
- D.
  
  Neutralization
5.

Water is added to two test tubes. Toluene is added to one and hexane is added to the other. What would you expect to observe in the test tubes?
- A.
  
  Both are soluble in water
- B.
  
  Bhexane is soluble but toluene is not soluble
- C.
  
  Toluene is soluble but hexane is not soluble
- D.
  
  Neither hexane or toluene are soluble in water
6.

The black balls in the model kits used to represent organic molecules have four holes because
- A.
  
  They represent nitrogen, which makes four bonds
- B.
  
  All atoms in organic molecules make four bonds
- C.
  
  Four holes are needed to make multiple bonds
- D.
  
  They represent carbon, which makes four bonds
7.

In organic compounds, hydrogen makes
- A.
  
  One bond
- B.
  
  Two bonds
- C.
  
  Three bonds
- D.
  
  Four bonds
8.

Iron (III) chloride produces a purple color in the presence of
- A.
  
  1-butanol
- B.
  
  2-butanol
- C.
  
  2-methyl-2-propanol
- D.
  
  Phenol
9.

A Lucas test produces cloudiness immediately for an unknown. The unknown can be
- A.
  
  1-butanol
- B.
  
  2-butanol
- C.
  
  Tertiary butanol
- D.
  
  Phenol
10.

An unknown liquid is tested with chromic acid. The result is a blue-green solution. Based on this test result, what type of compound could this be?
- A.
  
  Ketone
- B.
  
  3o alcohol
- C.
  
  1o alcohol
- D.
  
  Alkane
11.

In organic compounds, oxygen makes
- A.
  
  One bond
- B.
  
  Two bonds
- C.
  
  Three bonds
- D.
  
  Four bonds
12.

Which alcohol produces a yellow precipitate in the presence of iodine when heated under basic conditions, and gives a blue-green color in the presence of chromic acid.
- A.
  
  1-butanol
- B.
  
  Phenol
- C.
  
  Tertiary butanol
- D.
  
  2-butanol
13.

A student is trying to identify a 3^o alcohol from possible 1^o, 2^o, and 3^o alcohols. Which of these tests will be most helpful in making the identification?
- A.
  
  Ferric Chloride test
- B.
  
  Iodoform test
- C.
  
  Lucas test
- D.
  
  Ceric Nitrate test
14.

The iodoform test would be positive for
- A.
  
  1-butanol
- B.
  
  2-butanone
- C.
  
  3-pentanone
- D.
  
  Toluene
15.

The following compound would give a positive Tollen’s test. True or False?
- A.
  
  True
- B.
  
  False
16.

A student is given three tubes. One contains 2-butanol; another contains 2-butanone; the final one contains cyclohexene. What combination of two tests would clearly identify each substance?
- A.
  
  Bromine and Ferric chloride tests
- B.
  
  Bromine and Iodoform tests
- C.
  
  Ceric nitrate and Ferric chloride tests
- D.
  
  Ceric nitrate and Iodoform tests
17.

Chromic Acid is
- A.
  
  An oxidizing agent
- B.
  
  A reducing agent
- C.
  
  A combustion reagent
- D.
  
  An addition agent
18.

An unknown organic substance gives a negative ferric chloride test, a positive ceric nitrate test, a positive chromic acid test and a positive iodoform test. The unknown is
- A.
  
  1-butanol
- B.
  
  2-butanol
- C.
  
  2-butanone
- D.
  
  Phenol
19.

Sucrose and lactose are
- A.
  
  Monosaccharides
- B.
  
  Polysaccharides
- C.
  
  Disaccharides
- D.
  
  Trisaccharides
20.

It is known that sucrose hydrolyzed because
- A.
  
  The hydrolysis product gave a negative Benedict’s test
- B.
  
  The hydrolysis product gave a positive Benedict’s test
- C.
  
  When iodine was added it turned blue-black
- D.
  
  When iodine was added it remained yellow-brown
21.

Benedict’s reagent gives a positive test for glucose. The following is true
- A.
  
  Glucose is reduced and the copper ions are oxidized
- B.
  
  Glucose is oxidized the copper ions are reduced
- C.
  
  Both glucose and the copper ions are reduced
- D.
  
  Both glucose and the copper ions are oxidized
22.

A solution of starch has been fully hydrolyzed. When some I₂ is added to the solution what will the resulting color be?
- A.
  
  Blue-black
- B.
  
  Colorless
- C.
  
  Green
- D.
  
  Yellow
23.

In the hydrolysis of sucrose, the most effective catalyst was
- A.
  
  Water
- B.
  
  Base
- C.
  
  Acid
- D.
  
  Sucrose
24.

Why is ferric chloride used to determine the purity of the aspirin produced in lab?
- A.
  
  The starting material has a phenol group, but aspirin does not
- B.
  
  Aspirin contains a phenol group in its structure
- C.
  
  Aspirin is soluble in ferric chloride
- D.
  
  The ferric chloride test cannot help determine the purity of the aspirin
25.

The differences in the solubility properties of acetic acid and benzoic acid are primarily due to
- A.
  
  Smell
- B.
  
  Size
- C.
  
  Hydrolysis in water
- D.
  
  There was no difference in the solubility properties