January 2017 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

Question 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85
 

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Questions

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Explanations

21 Which term is defined as a measure of the randomness of a system? (1) heat (3) pressure

(2) entropy (4) temperature

2   definition of entropy
22 Which formula represents an alkane?

(1) C2H2 (3) C3H4 (2) C2H4 (4) C3H8

4   Table Q

general formula of CnH2n+2

23 Which term represents a chemical reaction?

(1) deposition (3) sublimation

(2) combustion (4) vaporization

4   combustion is burning

the rest are phase changes

 

24 Which type of reaction includes esterification and polymerization? (1) decomposition (3) organic

(2) neutralization (4) nuclear

3   organic reactions
25 In a redox reaction, the total number of electrons lost is

(1) less than the total number of electrons gained

(2) greater than the total number of electrons gained

(3) equal to the total number of electrons gained

(4) unrelated to the total number of electrons gained

3   always equal

conservation of charge

 

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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