January 2024 Chemistry Regents Questions 21-30 Question Preview (ID: 62917)

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Which expression represents the heat of reaction for a chemical change?

a) 1

b) 2

c) 3

d) 4

Which phase change represents an increase in entropy?

a) liquid to gas

b) liquid to solid

c) gas to solid

d) gas to liquid

Systems in nature tend to change 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 name represents a hydrocarbon?

a) 1–hexene

b) 1–iodohexane

c) 3–hexanone

d) 3–hexanol

Which process occurs at the anode in an electrolytic cell?

a) addition

b) combustion

c) oxidation

d) reduction

Which formula represents an electrolyte?

a) H2O

b) CCl4

c) H2SO4

d) C6H12O6

Which formula represents an Arrhenius acid?

a) KCl

b) HCl

c) NH3

d) KOH

According to one acid-base theory, an acid is a substance that

a) donates hydroxide ions

b) donates hydrogen ions

c) accepts hydroxide ions

d) accepts hydrogen ions

Which nuclear emission has the greatest mass and ionizing power?

a) alpha particle

b) beta particle

c) gamma radiation

d) positron

Which statement describes a benefit of the nuclear reaction that occurs in a nuclear power plant?

a) Large amounts of water are needed to cool the nuclear reactor.

b) The power plant reaction can be used in dating geologic formations.

c) Radioactive isotopes are stored for a very long time at the power plant site.

d) A large amount of energy is produced from a small amount of a radioisotope.

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