June 2019  Chemistry Regents #46-50

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3  
47 Which equation represents fermentation?

(1)   C2H4 + H2O -> CH3CH2OH

(2)   C2H4 +HCl --> CH3CH2Cl

(3)   C6H12O6 --> 2CH3CH2OH + CO2

(4)   2CH3CHO --> C3H5CHO + H2O

3  
48 Given the equation representing a reaction:

3CuCl2  +  2Al  -->  3 Cu  + 2 AlCl3

The oxidation number of copper changes from

(1)  +1 to 0

(2)  +2 to 0

(3)  +2 to + 1

(4)  +6 to +3

2  

 

49 Given the equation representing a reversible reaction:

CH3COOH + H2O <=> CH3COO-  +  H3O+

According to one acid-base theory, the two H+ donors in the equation are:

(1)   CH3COOH and H2O

(2)   CH3COOH and H3O+

(3)   CH3COO-   and H2O

(4)   CH3COO-   and H3O+

 
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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 Questions 52-54 Questions 55-57 Questions 58-61 Questions 62-65 Questions 66-69 Questions 70-73 Questions 74-77 Questions 78-80 Questions 81-85  

 

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