June 2013 Chemistry Regents #21-30

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Question 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77  Questions 78-80  Questions 81-82  Questions 83-85

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21 Which process is used to determine the concentration of an acid?

(1) chromatography    (3) electrolysis

(2) distillation          (4) titration

4    

22 The compounds CH3OCH3 and CH3CH2OH have different functional groups. Therefore, these compounds have different

(1) chemical properties

(2) gram-formula masses

(3) percent compositions by mass

(4) numbers of atoms per molecule

1    

23 Which term identifies the half-reaction that occurs at the anode of an operating electro­chemical cell?

(1) oxidation     (3) neutralization

(2) reduction    (4) transmutation

1    

 

24 During the operation of a voltaic cell, the cell produces

(1) electrical energy spontaneously

(2) chemical energy spontaneously

(3) electrical energy nonspontaneously

(4) chemical energy nonspontaneously

1    

25 In which type of chemical reaction are electrons transferred?

(1) organic addition

(2) oxidation-reduction

(3) double replacement

(4) acid-base neutralization

2    

26 A substance that dissolves in water and produces hydronium ions as the only positive ions in the solution is classified as

(1) an alcohol (3) a base

(2) an acid    (4) a salt

2    

 

27 According to one acid-base theory, a base is an

(1) H+ acceptor (3) Na+ acceptor

(2) H + donor (4) Na+ donor

1    

28 Which compound is an electrolyte?

(1) CCl4            (3) C6H12O 6

(2) CH3OH     (4) Ca(OH)2

4    

 

29 Which term identifies a type of nuclear reaction?

(1) fermentation   (3) reduction

(2) deposition     (4) fission

4    

30 Which radioisotopes have the same decay mode and have half-lives greater than 1 hour?

(1) Au-198 and N-16   (3) 1-131 and P-32

(2) Ca-37 and Fe-53    (4) Tc-99 and U-233

3    

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Question 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-77  Questions 78-80  Questions 81-82  Questions 83-85

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