Question

28) 28) An abandoned Indiana coal mine spoil bank contains chunks o s f rite minerals. Under rosion and weathering the pyrites leech large amounts of su ats of sulfuric acid (H2SO4). The spoil banks are also mixed with large quantities of clay carbonates. What should occur over time? are also mixed with large quantities of basic limestone and A) The pH level will remain at 7.0 because of constant washing with The pH levels will be spotty and vary over tims, first more acidic butanning back toward 7.0. C) The pH level will drop until all acid has washed out. D) The pH level will remain at 7.0 because all acid will be immediately neutralized by bases. 29). 29) Prior to prescription medications to control stomach acid and "heart bum" people consumed baking soda (sodium bicarbonate) to decrease their discomfort. This would indicate that sodium bicarbonate A) neutralizes stomach acid by combining with excess H" B) effectively buffers stomach acid by releasing H C) should be sold as a prescription drug D) blocks acid production by combining with OH- 30 30) Which of the following statements is NOT true about electron configurations? A) If an atom has two or more shells, the octet rule applies. B) If an atom has only one shell, it is complete with two electrons. C) If an atom has two or more shells, the outer shell is complete with eight electrons. D) Atoms with more than eight electrons in the outer shell react by gaining electrons. times 31) A solution with a pH of 7.0 has A) 30; more C) 109, more H than a solution of pH 10. B) none of these is correct D) 0-3, less 32) The characteristic way in which atoms of an element react is most related to the A) number of electrons in the outermost shell. B) number of neutrons in the nucleus. C) number of electrons in the innermost shell. D) size of the nucleus. 33) Which statement is NOT true about covalent bonds? A) A single covalent bond is drawn as a line between two atoms. B) A pair of electrons is shared between two atoms for each covalent bond. C) Covalent bonds form when an electron is completely lost or gained from an atom. D) Shared electrons allow an atom to complete its outer electron shell in a covalent molecule.

Answer 1

Question

28. Over the time,pH level will be spotty and vary over the time but drifting back towards ph 7. Hence, option b is correct.

29. Sodium bicarbonate neutralizes the stomach acid by combining with excess hydrogen ion. Hence, option a is correct.

30. Atom having more than 8 electrons will not gain electrons. Hence, option d is correct.

31. A solution with ph of 7 has 10^-3 times the hydrogen ion. Hence, option c is correct.

32. The number of electrons in the outermost shell decide chracaterstics way of an atom react. Hence, option a is correct.