June 2022 Chemistry Regents Questions 21-30 Question Preview (ID: 59693)


Use Your Knowledge Of Chemistry To Answer All Questions In The Data Set. You Will Need Your Chemistry Reference Tables And A Calculator To Answer Some Of The Questions. Good Luck. TEACHERS: click here for quick copy question ID numbers.

Which statement describes this reaction at equilibrium?
a) The concentration of the reactant and the product must be equal.
b) The concentration of the reactant and the product must be constant.
c) The rates of the forward and reverse reactions are increasing.
d) The rates of the forward and reverse reactions are decreasing.

Which phrase describes the effect of adding a catalyst to a chemical reaction in order to increase the reaction rate?
a) provides a different reaction pathway with a lower activation energy
b) provides a different reaction pathway with a higher activation energy
c) uses the same reaction pathway with a higher activation energy
d) uses the same reaction pathway with a lower activation energy

Systems in nature tend to undergo changes toward
a) lower energy and less disorder
b) lower energy and greater disorder
c) higher energy and less disorder
d) higher energy and greater disorder

Which element must be present in an organic compound?
a) carbon
b) sulfur
c) nitrogen
d) oxygen

Which formula represents a saturated hydrocarbon?
a) C2H2
b) C2H4
c) C6H10
d) C6H14

Which reaction occurs at the anode in an electrochemical cell?
a) saponification
b) oxidation
c) esterification
d) reduction

Which statement describes the two types of reactions that occur in operating electrochemical cells?
a) Nonspontaneous reactions occur in voltaic cells, and spontaneous reactions occur in electrolytic cells.
b) Nonspontaneous reactions occur in electrolytic cells, and nonspontaneous reactions occur in voltaic cells.
c) Spontaneous reactions occur in voltaic cells, and nonspontaneous reactions occur in electrolytic cells.
d) Spontaneous reactions occur in electrolytic cells, and spontaneous reactions occur in voltaic cells.

Which term describes an acid according to one acid-base theory?
a) H+ acceptor
b) H+ donor
c) H2 acceptor
d) H2 donor

Which emission will be released from an unstable Fe-53 nucleus?
a) an alpha particle
b) a beta particle
c) a positron
d) a proton

What is a potential risk associated with radioactive isotopes?
a) biological exposure
b) curing of diseases
c) industrial measurements
d) tracing chemical processes

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