Question37 to 40.
37. The pH of pure water is neutral, the best explanation for this is (A) in pure water, the [H] and [OH]
concentration are the same (8) the pH of pure water is 7 (C) pure water will never ionize (D) water do not contain free H
38. A pH value which is greater than 7 would indirate (A) an acidic medium (B) a basic medium (C) a neutral medium
(D) slightly acid medium
39. In universal indicators, red color indicates (A) strong alkali (B) strong acid (C) weak acid (D) weak trase
40. One of the errors encountered in the experiment to determine the heat of neutralization is (A) difficulty in
knowing when the reaction goes to completion (B) use of magnetic stirrer (C) lack of calorimeter (D) absence of electricity
37. The best explanation for the pH of pure water being neutral is that (A) in pure water, the [H] and [OH] concentration are the same.
38. A pH value which is greater than 7 would indicate (B) a basic medium.
39. In universal indicators, red color indicates (B) strong acid.
40. One of the errors encountered in the experiment to determine the heat of neutralization is (A) difficulty in knowing when the reaction goes to completion.