June 2023 Chemistry Regents Questions 11-20 Question Preview (ID: 62055)


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 changes in both charge and radius occur when an atom loses an electron?
a) A negative ion is formed with a smaller radius than the atom.
b) A negative ion is formed with a larger radius than the atom.
c) A positive ion is formed with a smaller radius than the atom.
d) A positive ion is formed with a larger radius than the atom.

Which statement describes what occurs when two iodine atoms react to produce an iodine molecule?
a) A bond forms and energy is absorbed.
b) A bond forms and energy is released.
c) A bond breaks and energy is absorbed.
d) A bond breaks and energy is released.

Which process can be used to separate a mixture of two liquids having different boiling points?
a) deposition
b) distillation
c) filtration
d) sublimation

Which statement describes a solution of sodium chloride in water?
a) The mixture is heterogeneous, the solute is NaCl and the solvent is H2O.
b) The mixture is heterogeneous, the solute is H2O and the solvent is NaCl.
c) The mixture is homogeneous, the solute is NaCl and the solvent is H2O.
d) The mixture is homogeneous, the solute is H2O and the solvent is NaCl.

At STP, which property would be the same for 1.0 liter of helium and 1.0 liter of argon?
a) boiling point
b) density
c) mass
d) number of atoms

The melting of an ice cube is an example of an
a) endothermic, chemical change
b) endothermic, physical change
c) exothermic, chemical change
d) exothermic, physical change

Which statement explains the low boiling point of hydrogen, H2, at standard pressure?
a) Hydrogen has strong covalent bonds.
b) Hydrogen has weak covalent bonds.
c) Hydrogen has strong intermolecular forces.
d) Hydrogen has weak intermolecular forces.

In chemical reactions, which term is defined as the difference between the potential energy of the products and the potential energy of the reactants?
a) heat of fusion
b) heat of reaction
c) thermal conductivity
d) electrical conductivity

Which phrase describes what happens to the reaction pathway and activation energy of a reaction to which a catalyst is added?
a) the same pathway with the same activation energy
b) the same pathway with a lower activation energy
c) a different pathway with the same activation energy
d) a different pathway with a lower activation energy

An atom of which element is bonded to the carbon atom in the amide functional group?
a) iodine
b) nitrogen
c) phosphorus
d) sulfur

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