AP BIO UNIT 1 TEST- PRACTICE TEST GUARANTEED SUCCESS

AP BIO UNIT 1 TEST- PRACTICE TEST GUARANTEED SUCCESS hydrogen bond ️which of the following is most easily broken? a. hydrogen bond b. triple covalent bond c. single covalent bond d. ionic bond covalent ️what type of bond is formed when atoms share electrons? a. ionic b. covalent c. hydrogen all of the above ️water molecules are a. polar b. hydrogen bonded to one another c. cohesive d. all of the above Cl ️which of the following elements is not one of the four most common in living organisms a. C b. N c. O d. Cl cohesion ️water's property of surface tension is due to a. cohesion b. adhesion c. high specific heat d. ionic bonding atoms together in molecules, molecules to other molecules ️ionic and covalent bonds attach ___ while hydrogen bonds attach ___ a. molecules to other molecules, atoms together in molecules b. water molecules to surfaces, water molecules to each other c. atoms together in molecules, molecules to other molecules d. water molecules to each other, water molecules to surfaces the pH goes above 7 ️what a solution becomes increasingly basic a. the pH goes down b. the number of H+ ions increases c. the pH remains the same d. the pH goes above 7 the number of electrons in the outermost energy level ️the number of bonds that an atom will make with other atoms is related to a. the number of electrons in the innermost shell number of neutrons in the nucleus c. the number of electrons in the outermost energy level d. the number of neutrons in the outermost energy level the pH of water to go down ️When HCl is dissolved in water, it makes H+ ions and Cl- ions. This causes _____. a. the pH of the water to go up. b. a pH reading of 15. c. the pH of the water to go down. d. a pH reading of 7. It is a universal solvent. ️Which of the following is not true about water? a. It dissolves other polar molecules. b. Drops cling together due to hydrogen bonding. c. It is a universal solvent. d. It is less dense as a solid than as a liquid. 100X more H+ ️A solution of pH 6 contains ____ than the same amount of solution of pH 8. a. 4X more H+ c. 100X less H+ b. 100X more H+ d. 2X more H+ Solvent...solute...acidic ️A can of soda consists mostly of sugar dissolved in water, with some carbon dioxide gas that makes it fizzy and makes the pH less than 7. In chemical terms you could say that soda is an aqueous solution, where water is the _____, sugar is an _____, and carbon dioxide makes the solution _____. a. Solvent ... solute ...basic b. Solute ... solvent ...basic c. Solvent...solute...acidic d. Solute ... solvent ...acidic Donates H+ when conditions become too basic and accepts H+ ions when conditions become too acidic. ️A buffer maintains a stable pH by: a. Providing an acid to control overly basic conditions in the body b. Donates OH- ions when conditions become too acidic and accepts OH- ions when conditions become too basic c. Donates H+ when conditions become too basic and accepts H+ ions when conditions become too acidic. d. Providing a base to control overly acidic conditions in the body. Nitrogen oxides ... sulfur oxides ️The emission of _____ and _____ are primarily responsible for acid precipitation. a. Carbon dioxide ... methane b. CFC's ... sulfur oxides c. Nitrogen oxides ... sulfur oxides d. Carbon dioxide ... ozone all of the above ️Hydrogen bonding ___________. a. causes water molecules to cling to each other b. allows water to absorb a lot of heat without a huge change in temperatu