June 2018  Chemistry Regents #46-50

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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

Questions 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-76  Questions 77-79  Questions 80-82  Questions 83-85 

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46 Given the balanced equation representing a reaction:

Ni(s) + 2HCl(aq) → NiCl2(aq) + H2(g)

In this reaction, each Ni atom

(1) loses 1 electron      (3) gains 1 electron

(2) loses 2 electrons    (4) gains 2 electrons

   
47 Which equation represents a reduction half-reaction?

(1) Fe → Fe3+ + 3e–          (3) Fe3+ → Fe +  3e–

(2) Fe +  3e- → Fe3+         (4) Fe3+ +  3e- → Fe

   
48 Given the balanced ionic equation representing a reaction:

Cu(s) + 2Ag(aq) → Cu2+(aq) + 2Ag(s)

During this reaction, electrons are transferred from

(1) Cu(s) to Ag+(aq)

(2) Cu2+(aq) to Ag(s)

(3) Ag(s) to Cu2+(aq)

(4) Ag(aq) to Cu(s)

   

 

49 Which metal reacts spontaneously with Sr2 ions?

(1) Ca(s)      (3) Cs(s)

(2) Co(s)      (4) Cu(s)

   
50 Given the balanced equation representing a reaction:

HCl  +  H2O → H3O+ +  Cl-

The water molecule acts as a base because it

(1) donates an H+     (3) donates an OH-

(2) accepts an H +  (4) accepts an OH-

   

 

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 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-76  Questions 77-79  Questions 80-82  Questions 83-85 

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