August 2015  Chemistry Regents #26-30

Highlight to reveal answers and explanations

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-74  Questions 75-76  Questions 77-78  Questions 79-80  Questions 81-82  Questions 83-85

Other Regents Exams

 

Questions

Answer Links

Explanations

26 Based on the Arrhenius theory, when potassium hydroxide dissolves in water, the only negative ion in the aqueous solution is

(1) O2- (aq)     (3) H- (aq)

(2) OH2- (aq)   (4) OH- (aq)

4 link hydroxide= OH-
27 Compared to distilled water, an aqueous salt solution has

(1) better electrical conductivity

(2) poorer electrical conductivity

(3) a lower boiling point at standard pressure

(4) a higher freezing point at standard pressure

1 link moving charge when salt dissolves= conductivity
28 According to one acid-base theory, water can act as a base because a water molecule can

(1) donate an H+ ion     (3) donate an H- ion

(2) accept an H+ ion     (4) accept an H- ion

2 link Bases accept H+

 

29 Compared to the half-life and decay mode of the nuclide 90Sr, the nuclide 226Ra has

(1) a longer half-life and the same decay mode

(2) a longer half-life and a different decay mode

(3) a shorter half-life and the same decay mode

(4) a shorter half-life and a different decay mode

2 link Use Table N for both
30 Which net change occurs in a nuclear fusion reaction?

(1) Ionic bonds are broken.

(2) Ionic bonds are formed.

(3) Energy is converted to mass.

(4) Mass is converted to energy.

4 link E=mc2

mass turns into a lot of energy

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54 Questions 55-57 Questions 58-59 Questions 60-61 Questions 62-65 Questions 66-68 Questions 69-72 Questions 73-74  Questions 75-76  Questions 77-78  Questions 79-80  Questions 81-82  Questions 83-85

Back to Regents Exams