August 2024 Chemistry Regents Questions 21-30 Question Preview (ID: 63416)


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. TEACHERS: click here for quick copy question ID numbers.

Which statement describes a chemical reaction that has reached equilibrium?
a) The reactants have been completely consumed.
b) The reverse reaction has stopped.
c) The concentrations of the products and reactants remain constant
d) The rate of the forward reaction is greater than the rate of the reverse reaction.

An enzyme acts as a catalyst to speed up a reaction by providing an alternate reaction pathway that has a
a) higher activation energy
b) lower activation energy
c) higher heat of reaction
d) lower heat of reaction

Which element has atoms that can bond together to form chains, rings, or networks?
a) carbon
b) hydrogen
c) nitrogen
d) oxygen

A molecule of which compound contains an atom of nitrogen?
a) 2-chloropropane
b) 1-propanol
c) 2-pentanone
d) 1-propanamine

How many electrons are shared between the carbon atoms in a molecule of ethyne?
a) 6
b) 2
c) 3
d) 4

Which change takes place in the process of reduction?
a) A neutron is lost.
b) A neutron is gained.
c) A electron is lost.
d) A electron is gained.

The indicator methyl orange is red in an aqueous solution that has a pH value of
a) 9.2
b) 7.0
c) 4.5
d) 2.7

Which radioactive emissions are listed in order from greatest penetrating power to least penetrating power?
a) alpha particle, beta particle, gamma radiation
b) beta particle, gamma radiation, alpha particle
c) gamma radiation, beta particle, alpha particle
d) gamma radiation, alpha particle, beta particle

What is one benefit of a nuclear fission reaction?
a) Fission reactants are hydrogen isotopes.
b) Fission products must be stored indefinitely.
c) Electrical energy can be produced using fission reactions.
d) Workers in nuclear power plants can be exposed to radiation from fission reactions.

Which statement compares the relative amounts of energy released during a chemical reaction and a nuclear reaction when both reactions consume 1.0 mole of reactant?
a) The chemical and nuclear reactions release equal amounts of energy.
b) The nuclear reaction releases one half the amount of energy of the chemical reaction.
c) The chemical reaction releases much more energy than the nuclear reaction.
d) The nuclear reaction releases much more energy than the chemical reaction.

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