June 2023 Chemistry Regents Questions 1-10 Question Preview (ID: 62054)


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.

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.
a) has an overall positive charge
b) has an overall negative charge
c) contains negative electrons
d) contains positive electrons

Which two particles each have a mass of approximately one atomic mass unit?
a) an electron and a proton
b) an electron and a positron
c) a neutron and a proton
d) a neutron and a positron

The wave-mechanical model of the atom describes the location of electrons
a) as loosely packed in the nucleus of an atom
b) as densely packed in the nucleus of an atom
c) in circular paths around the nucleus
d) in orbitals outside the nucleus

When a ground state electron in an atom moves to an excited state, the electron
a) absorbs energy as it moves to a higher energy state
b) absorbs energy as it moves to a lower energy state
c) releases energy as it moves to a higher energy state
d) releases energy as it moves to a lower energy state

Which statement describes a chemical property of iron?
a) Iron is malleable.
b) Iron conducts electricity.
c) Iron reacts with nitric acid.
d) Iron has a high melting point.

Diamond and graphite are two forms of solid carbon. These two forms of carbon have
a) different crystal structures and different properties
b) different crystal structures and the same properties
c) the same crystal structure and different properties
d) the same crystal structure and the same properties

Which substance can be broken down by a chemical change?
a) cobalt
b) ethane
c) krypton
d) manganese

Which equation represents conservation of mass and energy?
a) CH4(g) + O2(g) + 890.4 kJ → CO2(g) + H2O(l)
b) CH4(g) + O2(g) → CO2(g) + H2O(l) + 890.4 kJ
c) CH4(g) + 2O2(g) + 890.4 kJ → CO2(g) + 2H2O(l)
d) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ

At STP, which property can be used to differentiate a 10.-gram sample of NaCl(s) from a 10.-gram sample of NaNO3(s)?
a) mass of the sample
b) temperature of the sample
c) solubility in water
d) phase at STP

What is the number of electrons shared between the two atoms in an O2 molecule?
a) 6
b) 2
c) 3
d) 4

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