January 2017 Chemistry Regents #2125
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Questions 
Answer  Links 
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 C_{n}H_{2n+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 

