141⟩ What are the two most common end-products of alcoholic fermentation?
Ethanol And Carbon Dioxide
Chemistry
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176 Chemistry Questions And Answers
142⟩ Carbohydrates are made of what three elements?
Carbon,
Hydrogen,
Oxygen
143⟩ The reaction of an acid with an alcohol to form an ester and water is called
Esterification
144⟩ 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
145⟩ 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
146⟩ 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
147⟩ Ten grams of dietary fat contains how many food calories?
1. 40 calories
2. 90 calories
3. 60 calories
4. 120 calories
Answer: B
148⟩ 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
149⟩ 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
150⟩ 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
151⟩ 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
152⟩ What molecule is characteristically prevalent in sour milk and tired muscles?
Lactic Acid
153⟩ Which of the following is a nonpolar molecule
1. HCl
2. NaCl
3. CaCl
4. H2
Answer: D
154⟩ 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
155⟩ Myoglobin binds oxygen in what tissue in the human body?
Muscle
156⟩ 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
157⟩ What is the term for the pH at which an amino acid or protein becomes electrically neutral?
Isoelectric Point
158⟩ Name the two most abundant elements in the universe?
Hyydrogen And Helium
159⟩ How many significant figures are there in the number 0.0036
2
160⟩ 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
