Food Science Midterm Examination

100 Questions | By DianeMoroney | Updated: Aug 30, 2022 | Attempts: 96

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This Examination covers the following Standards: FCS-FS-1. Students will define food science and explore careers in food science. ; a) Define the study of food science and summarize how food products and processing methods have changed in modern history due to contributions of food scientists. ; b) Describe the history of the development of food and food systems emphasizing the transition from hunting and gathering to farming and then to market-based societies. &n

Questions and Answers

1.

The energy a substance uses or releases to change phase.
- A.
  
  Latent heat
- B.
  
  Heat of vaporization
- C.
  
  Sublimation
- D.
  
  Electronegativity
2.

The MOST reliable way to find a pH level is with _______________.
- A.
  
  Litmus paper
- B.
  
  Anthocyanins
- C.
  
  A pH scale
- D.
  
  A ph meter
3.

Blood is kept at a healthy, slightly basic pH by ___________.
- A.
  
  An adequate supply of basic foods in the diet
- B.
  
  Basic fluids secreted in the digestive tract
- C.
  
  Various buffering agents in the blood
- D.
  
  Antacid dietary supplements
4.

On the pH scale, ___________________.
- A.
  
  Higher values indicate greater acidity
- B.
  
  Lower values indicate greater acidity
- C.
  
  A neutral solution has a value of 14
- D.
  
  None of the above
5.

A base in which few molecules ionize is called _______________.
- A.
  
  Weak
- B.
  
  Dilute
- C.
  
  Neutral
- D.
  
  All of the above
6.

One sign that neutralization has occurred is _______________.
- A.
  
  A blue indicator
- B.
  
  A slippery feel
- C.
  
  The presence of water
- D.
  
  The presence of anthocyanins
7.

Acids in foods pose little health risk because __________________________.
- A.
  
  They are only slightly soluble
- B.
  
  They are weak
- C.
  
  They are not often used in food
- D.
  
  All of the above
8.

Hydrogen ions and hydroxide ions ________________.
- A.
  
  Carry opposite charges
- B.
  
  Are products of ionization
- C.
  
  May combine to form water
- D.
  
  All are true
9.

Five liters of a 3 M solution of ammonia contains _________________.
- A.
  
  0.66 moles of ammonia
- B.
  
  1.66 moles of ammonia
- C.
  
  8 moles of ammonia
- D.
  
  15 moles of ammonia
10.

A base in solution ________________.
- A.
  
  Produces hydroxide ions
- B.
  
  Produces hydrogen ions
- C.
  
  Neutralizes the solution
- D.
  
  Lower's the solution's pH
11.

To do a titration of an acid solution, you need to know _________________.
- A.
  
  The volume of the acid solution
- B.
  
  The volume of a basic solution
- C.
  
  The concentration of the basic solution
- D.
  
  All are true
12.

Having an equal number of hydrogen atoms and hydrogen ions.
- A.
  
  Neutral
- B.
  
  Molarity
- C.
  
  Base
- D.
  
  Acid
13.

A stage of titration that indicates neutralization
- A.
  
  Equivalence point
- B.
  
  Hydrogen ion
- C.
  
  Water
- D.
  
  Indicator
14.

A procedure done to determine the molarity of a solution
- A.
  
  Titration
- B.
  
  Molarity
- C.
  
  Concentration
- D.
  
  Tonsilectomy
15.

A measure of relative acidity in a solution
- A.
  
  PH
- B.
  
  Titration
- C.
  
  Buffer
- D.
  
  Base
16.

A substance that releases hydrogen ions in a solution
- A.
  
  Acid
- B.
  
  Base
- C.
  
  Neutral
- D.
  
  Buffer
17.

A positively charged particle
- A.
  
  Hydrogen ion
- B.
  
  Hydroxide ion
- C.
  
  Titration
- D.
  
  Anthocyanin
18.

A substance that responds to pH by changing color
- A.
  
  Indicator
- B.
  
  PH
- C.
  
  Water
- D.
  
  Base
19.

A measurement that tells the amount of a substance per unit of volume
- A.
  
  Concentration
- B.
  
  Molarity
- C.
  
  Titration
- D.
  
  Indicator
20.

A result of a hydrogen ion and hydroxide ion bonding
- A.
  
  Water
- B.
  
  Base
- C.
  
  Neutral
- D.
  
  Acid
21.

A substance that releases hydroxide ions in solution
- A.
  
  Base
- B.
  
  Neutral
- C.
  
  Acid
- D.
  
  Molarity
22.

A measurement that indicates the moles of solute per liter of solution
- A.
  
  Molarity
- B.
  
  Polarity
- C.
  
  Equivalence point
- D.
  
  Anthocyanin
23.

A substance that prevents blood from becoming too acidic or basic
- A.
  
  Buffer
- B.
  
  Base
- C.
  
  Acid
- D.
  
  PH
24.

A chemical reaction that produces water and salts
- A.
  
  Neutralization
- B.
  
  Aerobic activity
- C.
  
  Anaerobic activity
- D.
  
  Concentration
25.

A plant pigment used to test pH
- A.
  
  Anthocyanin
- B.
  
  Acid
- C.
  
  Buffer
- D.
  
  Titration