January 2016 Chemistry Regents #21-25

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

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

 Other Regents Exams

 

Questions

Answer Links

Explanations

21  When a chemical reaction is at equilibrium, the concentration of each reactant and the concentration of each product must be

(1) constant

(2) variable

(3) equal

(4) zero

1   concentrations must be constant at equilibrium
22  Which element is present in all organic compounds?

(1) nitrogen 

(2) oxygen   

(3) carbon

(4) sulfur

3   organic has carbon
23 Two types of organic reactions are

(1) deposition and saponification

(2) deposition and transmutation

(3) polymerization and saponification

(4) polymerization and transmutation

3   polymerization and saponification

 

24  Given the balanced equation representing a reaction:

2Al(s) + 3Cu2+(aq) > 2Al3+(aq) + 3Cu(s)

Which particles are transferred in this reaction?

(1) electrons (2) neutrons

(3) positrons (4) protons

1   redox involves electrons transferring
25 In an operating voltaic cell, reduction occurs

(1) at the anode

(2) at the cathode

(3) in the salt bridge

(4) in the wire

2   red Cat

 

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

Back to Regents Exams