Fresh Chemistry Interview Questions & Answers:

1. This metal lies between silicon and tin in its chemical and physical properties and used extensively in the making of transistors:

Germanium

2. The disruption of the three-dimensional shape of a protein by factors such as heat, acids, bases, and organic solvents, is called what?

Denaturation

3. Long chains of amino acids are linked together through what type of bond?

Peptide Bonds

4. What is the acid anhydride of H2CO3?

CO2

5. An atom has 18 protons and 22 neutrons. What is its mass number:

40

6. What radioactive isotope of this alkaline earth element formed as a fission product of uranium and is of particular importance because it is assimilated in the body much like calcium:

Strontium

7. What colorless liquid was originally produced from the distillation of wood and is often referred to as wood alcohol:

Methanol

8. Convert the molecular structure of the hydrocarbon C5H12 into its straight-chain Condensed Structural Formula:

CH3CH2CH2CH2CH3

9. In order to compare two different gas samples, scientists use what is called the STP. What does STP stand for?

Standard Temperature And Pressure

10. Give the symbol for the element that is derived from the Latin word Plumbum?

Pb

11. Cellulose is a polymer of repeating units of what molecule?

Glucose

12. What gas was discovered by Daniel Rutherford in 1772 by placing a mouse inside a bell jar, removing all the oxygen in the jar by burning a substance in it, and demonstrating the asphyxiation of the mouse:

Nitrogen

13. Name the two most abundant elements in the universe?

Hyydrogen And Helium

14. How many significant figures are there in the number 0.0036:

2

15. Many of the groups of elements in the periodic table have acquired common names. The elements in Group IA, with the exception of hydrogen, are called what?

Alkali Metals

16. What is the term for the pH at which an amino acid or protein becomes electrically neutral?

Isoelectric Point

17. Myoglobin binds oxygen in what tissue in the human body?

Muscle

18. What molecule is characteristically prevalent in sour milk and tired muscles?

Lactic Acid

19. How many milliliters of water would you add to 100 milliliters of a 0.350 molar solution to make a 0.100 molar solution?

250 Milliliters

20. A patient in the Emergency Room required 20 grams of a clotbusting drug based on his body weight of 150 pounds. The weight per volume (w/v) of the drug solution is 10%. How many milliliters of the drug solution should be administered?

200 Milliliters

21. If a human being were to be exposed suddenly to the surface of Mars, which of the following would most likely occur to the person's blood:

1. it would boil in a matter of seconds
2. it would freeze in a matter of seconds
3. it would coagulate in a matter of seconds
4. there would be no immediate change

Answer: A

22. Which of the following is a nonpolar molecule:

1. HCl
2. NaCl
3. CaCl
4. H2

Answer: D

23. Element A is a nonmetal with an electronegativity value of 3.0 and element B is a nonmetal with an electronegativity value of 2.5. What kind of bonding will occur between these two elements:

1. nonpolar covalent
2. polar covalent
3. ionic
4. fission

Answer: B

24. Which one of the following statements is true about the specific gravity of a substance:

1. specific gravity is one of the few unitless values encountered in chemistry
2. the specific gravity of water is 1 gram per milliliter
3. specific gravity is calculated by dividing the density of water by the density of the substance
4. specific gravity is measured with an instrument called the densitometer

Answer: A

25. Which of the following is true of an oxidation reaction:

1. in an electrolytic cell, oxidation takes place at the cathode
2. in the following reaction, bromine is oxidized Br2 + 2e- à 2Br-
3. in a chemical reaction, the substance that is being oxidized is also known as the reducing agent
4. in a chemical reaction, the substance that is being oxidized is also known as the oxidizing agent

Answer: B

26. Ten grams of dietary fat contains how many food calories?

1. 40 calories
2. 90 calories
3. 60 calories
4. 120 calories

Answer: B

27. If CO2 is bubbled through distilled water at room temperature, which of the following will most likely occur:

1. the pH of the water increases
2. the pH of the water decreases
3. the pH of the water is unchanged
4. carbon will precipitate out of solution

Answer: B

28. Which of the following is NOT true about cholesterol:

1. there is no cholesterol in plants
2. cholesterol is found in meats, milk and eggs
3. cholesterol is not synthesized in the human body
4. cholesterol is a component of cellular membranes

Answer: C

29. It is estimated that each person in the United States consumes an average of 100 pounds of sucrose each year. Which two simple sugars are linked to make a sucrose molecule?

Glucose And Fructose

30. What are the two most common end-products of alcoholic fermentation?

Ethanol And Carbon Dioxide

31. Carbohydrates are made of what three elements?

Carbon,
Hydrogen,
Oxygen

32. The reaction of an acid with an alcohol to form an ester and water is called:

Esterification

33. 4.0 liters of oxygen are mixed with 8.0 liters of nitrogen. Identify the solute and solvent in this mixture:

Oxygen Is The Solute; Nitrogen Is The Solvent

34. Knowing that Iron has an atomic number of 26, how many protons and how many electrons does Fe+2 have?

26 Protons,
24 Electrons

35. What is the common name of the molecule dihydrogen dioxide?

Hydrogen Peroxide