Chemistry Midterm Review

Which of the following best describes an exothermic reaction?

• It absorbs heat from the surroundings.

• It releases heat to the surroundings.

• It remains at a constant temperature.

• It does not involve any heat changes.

Tags

NGSS.HS-PS1-4

During an endothermic reaction, which of the following is true?

• The temperature of the surroundings decreases.

• Heat is absorbed from the surroundings.

• The reaction is spontaneous.

• The reaction releases energy.

Tags

NGSS.HS-PS1-4

Which of the following is true about the Kinetic Molecular Theory of Gases?

• All particles of matter are in constant motion

• All particles of matter are frozen

• All particles of matter are in constant temperature

Which of the following is a pressure value?

• 573 L

• 258 mmHg

• 853 K

• 642 kg

According to Charles's Law, what happens to the volume of a gas if its temperature is doubled while keeping pressure constant?

• The volume doubles.

• The volume halves.

• The volume remains the same.

• The volume increases, but not necessarily by a factor of 2

Boyle's Law describes the relationship between the pressure and volume of a gas at constant temperature. If the pressure of a gas is reduced by half while keeping the temperature constant, what happens to its volume?

• The volume doubles.

• The volume halves.

• The volume remains the same.

• The volume decreases, but not necessarily by a factor of 2

In 1910, Ernest Rutherford wanted to test the existence of the plum-pudding model of atomic structure. He devised the ____________.

• Copper foil experiment
• Gold foil experiment
• Bronze foil experiment
• Silver foil experiment

What experiment was responsible for discovering the electrons, a negatively charged particle?

• Gold-Foil Experiement

• Cathode-Ray Tube Experiment

• Plum Pudding Model

• Quantum Mechanics

Isotopic notation for an element includes:

• The number of protons only.

• The number of neutrons only.

• The mass number and atomic number.

• The chemical symbol and atomic mass.

Tags

NGSS.HS-PS1-8

What does the symbol "C-12" represent in isotopic notation?

• Carbon with 14 protons and 14 neutrons

• Carbon with 6 protons and 8 neutrons

• Carbon with 14 protons and 6 neutrons

• Carbon with 6 protons and 6 neutrons

Tags

NGSS.HS-PS1-8