Question 1

Which of the following best describes the function of the apparatus shown in the first image (a coffee-cup calorimeter)?

Accepted Answer

It measures the heat flow at constant pressure for reactions in solution.

Question 2

In the bomb calorimeter (second image), which of the following is held constant during the experiment?

Accepted Answer

Volume

Question 3

Refer to the chemical equation in the third image. What is the total number of moles of water produced when 2 moles of C2H6 are completely combusted?

Accepted Answer

6 moles

Question 4

The fourth image shows a light bulb emitting electromagnetic radiation. Which property of light is illustrated by the wavy line in the image?

Accepted Answer

Wave nature of light

Question 5

Based on the electromagnetic spectrum shown in the fifth image, which type of radiation has the shortest wavelength?

Accepted Answer

Gamma rays

Question 6

According to the visible spectrum in the sixth image, which color of visible light has the highest energy?

Accepted Answer

Violet

Question 7

Refer to the table of wavelength units in the seventh image. Which unit would be most appropriate for expressing the wavelength of visible light?

Accepted Answer

Nanometer

Question 8

The Bohr model diagram (eighth image) shows several electron orbits. According to Bohr’s model, what happens to the energy of an electron as it moves from n = 2 to n = 4?

Accepted Answer

The energy increases and a photon is absorbed.

Question 9

The ninth image shows an electron cloud. What does the density of the blue dots represent?

Accepted Answer

The probability of finding the electron at a given location

Question 10

The tenth image shows radial probability distributions for hydrogen atom orbitals. What trend is observed as the principal quantum number n increases?

Accepted Answer

The most probable distance from the nucleus increases.

Question 11

The eleventh image shows two spinning spheres with opposite directions. What quantum property of the electron is illustrated here?

Accepted Answer

Spin quantum number

Question 12

Refer to the orbital filling diagram in the twelfth image. How many electrons can occupy the 3d subshell?

Accepted Answer

10

Question 13

The thirteenth image shows the periodic table blocks. Which block contains the lanthanide series?

Accepted Answer

f-block

Question 14

Which of the following statements about the electromagnetic spectrum is correct?

Accepted Answer

As wavelength increases, frequency decreases.

Question 15

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number (l)

Question 16

Which of the following best describes Hund’s Rule?

Accepted Answer

Electrons occupy degenerate orbitals singly before pairing.

Question 17

Which of the following is a correct condensed electron configuration for selenium (Se)?

Accepted Answer

$$[Ar] 4s^2$ 3d$$^{10}$$ 4p^4$

Question 18

Which of the following transitions in a hydrogen atom would emit a photon with the highest energy?

Accepted Answer

$$n=2 to$$ $$n=1$$

Question 19

Which of the following best describes the difference between a shell and a subshell in atomic structure?

Accepted Answer

A shell is defined by the principal quantum number, and a subshell is defined by the angular momentum quantum number.

Question 20

Which of the following statements about electron configuration is correct?

Accepted Answer

The 4s subshell is filled before the 3d subshell.

Thermochemistry and Electronic Structure: Study Notes for General Chemistry

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