August 2015 Chemistry Regents #21-25

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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 51-54 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

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Questions

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Explanations

21 Which formula represents an unsaturated organic compound?

(1) CH4      (3) C3H8

(2) C2H4    (4) C4H10

2linkunsaturated= not all single bonds

3 are alkanes and 1 is not

alkanes CnH2n+2

22 All isomers of octane have the same

(1) molecular formula (3) physical properties

(2) structural formula (4) IUPAC name

1linkisomer-same formula different structures
23 Which formula represents a hydrocarbon?

(1) CH3I        (3) CH3CH3

(2) CH3NH2  (4) CH3OH

3linkhydrogen and carbon only

 

24 In a redox reaction, the number of electrons lost is equal to the number of

(1) protons lost     (3) neutrons gained

(2) neutrons lost    (4) electrons gained

4linkconservation of charge

lost = gained

25 At which electrode does oxidation occur in a voltaic cell and in an electrolytic cell?

(1) the anode in a voltaic cell and the cathode in an electrolytic cell

(2) the cathode in a voltaic cell and the anode in an electrolytic cell

(3) the anode in both a voltaic cell and an electrolytic cell

(4) the cathode in both a voltaic cell and an electrolytic cell

3linkAnOX Red Cat

oxidation at the Anode in all cells

 

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

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