January 2016 Chemistry Regents #26-30

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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

Question 51-53 Questions 54-56
 Questions 57-61 Questions 62-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-82 Questions 83-85

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26  Which type of substance yields hydrogen ions, H+ in an aqueous solution?

(1) an Arrhenius acid 

(2) an Arrhenius base

(3) a saturated hydrocarbon

(4) an unsaturated hydrocarbon

1   H+   is an Arrhenius acid 
27 Phenolphthalein is pink in an aqueous solution having a pH of

(1) 5    (2) 2   (3)7    (4) 12

4   basic pHs of  more than 10 is pink
28 According to one acid-base theory, NH3 acts as a base when an NH3 molecule

(1) accepts an H+ ion

(2) donates an H+ ion

(3) accepts an OH- ion

(4) donates an OH- ion

1   bases accept H+

 

29  Which reaction releases the greatest amount of  energy per mole of reactant?

(1) decomposition    (2) esterification

(3) fermentation        (4) fission

4   nuclear reactions releases the most amount of energy

fission

30 Which nuclear emission is negatively charged?

(1) an alpha particle   (2) a beta particle

(3) a neutron               (4) a positron

2   table O  beta is negative

 

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

Question 51-53 Questions 54-56
 Questions 57-61 Questions 62-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-82 Questions 83-85

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