June 2023 Chemistry Regents Questions 21-30 Question Preview (ID: 62056)
The Questions In This Practice Exam Are Thoughtfully Crafted To Assess Your Knowledge And Skills. They Cover A Range Of Topics And Formats, Offering A Valuable Opportunity For Self-assessment And Preparation.
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Which statement describes the two isomers of butane?
a) They have the same molecular formula but different structural formulas.
b) They have the same molecular formula and the same structural formula.
c) They have different molecular formulas and different structural formulas.
d) They have different molecular formulas but the same structural formula.
Which term represents an organic reaction that produces soap?
a) esterification
b) fermentation
c) saponification
d) solidification
In which part of an electrochemical cell does reduction occur?
a) anode
b) cathode
c) wire
d) voltmeter
Which energy change occurs in an operating voltaic cell?
a) chemical energy to electrical energy
b) chemical energy to nuclear energy
c) electrical energy to chemical energy
d) electrical energy to nuclear energy
Which substance is an Arrhenius base?
a) HNO3
b) KNO3
c) LiOH
d) CH3COOH
Which statement represents neutralization?
a) An Arrhenius acid and an Arrhenius base react to produce water and a salt.
b) An Arrhenius acid and a salt react to produce water and an Arrhenius base.
c) Water and an Arrhenius acid react to produce an Arrhenius base and a salt.
d) Water and a salt react to produce an Arrhenius base and an Arrhenius acid.
A tenfold increase in hydronium ion concentration is represented by
a) a decrease of one unit of pH
b) a decrease of 10 units of pH
c) an increase of one unit of pH
d) an increase of 10 units of pH
Which particle is emitted by the radioactive decay of francium-220?
a) an alpha particle
b) a beta particle
c) a positron
d) a neutron
Which type of reaction releases the greatest amount of energy per kilogram of reactant?
a) acid-base reaction
b) fission reaction
c) organic reaction
d) redox reaction
Which risk is related to the radioactive isotopes used to generate electricity?
a) depletion of fossil fuels
b) depletion of atmospheric ozone
c) exposure to acid rain
d) exposure to nuclear emissions
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