23 Jul WHICH OF THE FOLLOWING BEST DESCRIBES WHY IONIC MOLECULES DISSOLVE AND DISSOCIATE IN WATER?
d. Show more Question 1 Carbon forms bonds with a maximum of how many other atoms? Select one: a. 8 b. 2 c. 6 d. 4 Question 2 A chemical bond with unequal sharing of electrons is called Select one: a. polar covalent bonds b. polar ionic bonds c. nonpolar covalent bonds d. nonpolar ionic bonds Question 3 Which of the following is necessary for an atom to participate in the formation of a double covalent bond? Select one: a. There has to be a difference in electronegativity between it and the atom with which it forms the double covalent bond. b. The participating atoms must have two or more valence electrons c. The participating atoms must have a full outer shell d. The participating atoms must have two or more unpaired electrons. Question 4 The breakdown of large molecules by the enzymatic addition of water is an example of what kind of reaction? Select one: a. condensation b. hydrolysis c. reduction d. oxidation Question 5 Which of the following best describes why ionic molecules dissolve and dissociate in water? Select one: a. Water is formed from nonpolar covalent bonds between oxygen and hydrogen. b. Water is hydrophobic. c. Water is a molecule with highly polar covalent bonds. d. Water is liquid at room temperature. Question 6 Which of the following can alter the RATE of a reaction catalyzed by an enzyme? Choose all that are correct a. Cytoplasmic pH b. The number of covalent bonds broken in the reaction. c. The decrease in entropy associated with the reaction. d. Temperature e. The cellular concentration of ATP beyond saturation. Question 7 Which of the following is necessary for an atom to participate in the formation of a double covalent bond? Select one: a. There has to be a difference in electronegativity between it and the atom with which it forms the double covalent bond. b. The participating atoms must have two or more valence electrons c. The participating atoms must have a full outer shell d. The participating atoms must have two or more unpaired electrons. Question 8 Substances that give up protons H+ in water solution are called Select one: a. acids. b. isotopes. c. hydrophobic d. bases. Question 9 How do hydrophobic molecules react with water? Select one: a. They are attracted to water b. They are repelled by water c. They become polarized by water d. They cause the ionization of water Question 10 A reaction catalyzed by an enzyme displays which of the following characteristics? Select one: a. DeltaG remains the same as the uncatalyzed reaction b. The activation energy of the reaction is increased compared to the uncatalyzed reaction c. The addition of energy will not be required in the presence of the catalyst d. DeltaG is decreased compared to the uncatalyzed reaction e. The products will always be at a lower free energy state relative to the reactants Show less
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