June 2022 Chemistry Regents #21-25

Highlight to reveal answers and explanations

 

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 57-58 Questions 59-60 Questions 61-65 Questions 66-70 Questions 71-73 Questions 74-77 Questions 78-82 Questions 83-85  

 

Other Regents Exams

 

 

Questions

Answer Links

Explanations
21 Given the equation representing a system at equilibrium

2NO2 <=> N2O4

Which statement describes this reaction at equilibrium?

(1) The concentration of the reactant and the product must be equal.

(2) The concentration of the reactant and the product must be constant.

(3) The rates of the forward and reverse reactions are increasing.

(4) The rates of the forward and reverse reactions are decreasing.

 2   equilibrium question

CON CON REqual

Concentrations remain Constant

Rates are equal
22 Which phrase describes the effect of adding a catalyst to a chemical reaction in order to increase the reaction rate?

(1) provides a different reaction pathway with a lower activation energy

(2) provides a different reaction pathway with a higher activation energy

(3) uses the same reaction pathway with a higher activation energy

(4) uses the same reaction pathway with a lower activation energy

 1   definition of a catalyst
23 Systems in nature tend to undergo changes toward

(1) lower energy and less disorder

(2) lower energy and greater disorder

(3) higher energy and less disorder

(4) higher energy and greater disorder

 2   Lord of the Flies

The island burns...exothermic

everyone goes crazy...more randomness

 

24 Which element must be present in an organic compound?

(1) carbon   (2) sulfur  (3) nitrogen  (4) oxygen

 1   organic ...carbon
25 Which formula represents a saturated hydrocarbon?

(1) C2H2

(2) C2H4

(3) C6H10

(4) C6H14

 4   alkanes are saturated...all single bonds

table Q...general formula is Cn H2n+2

 

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 57-58 Questions 59-60 Questions 61-65 Questions 66-70 Questions 71-73 Questions 74-77 Questions 78-82 Questions 83-85  

   

 

 
Back to Regents Exams