Chemistry Quizzes

Photochemistry MCQs with Answers

Welcome to the Photochemistry MCQs with Answers, it helps learners quickly identify areas for improvement in Photochemistry Online Test.

Photochemistry is a branch of chemistry that explores the chemical effects of light and how light interacts with matter to induce chemical reactions. It investigates the absorption of light by molecules, the formation of excited states, and subsequent transformations. Key topics in Photochemistry include photochemical reactions, photophysical processes, and applications in fields such as photobiology and photomedicine.

To effectively grasp Photochemistry, utilizing diverse educational resources is crucial. Photochemistry MCQs offer a variety of questions that assess knowledge of light-induced chemical processes and their applications. Photochemistry quiz questions are designed to reinforce learning by focusing on specific aspects of photochemical principles and reactions. For comprehensive exam preparation, Photochemistry multiple choice questions cover essential concepts and advanced topics, ensuring thorough understanding. Photochemistry exam questions typically include theoretical principles and practical applications, essential for a well-rounded knowledge base. Additionally, Photochemistry practice tests serve as valuable tools for self-assessment, enabling students to identify areas requiring further study.

Photochemistry Online Quiz

By presenting 3 options to choose from, Photochemistry Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Photochemistry Questions and Answers and click over the correct answer.

  • Test Name: Photochemistry MCQ Quiz Practice
  • Type: Quiz Test
  • Total Questions: 40
  • Total Marks: 40
  • Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quiz, simply click on question and comment below that question, so that we can update the answer in the quiz section.

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Photochemistry MCQs

Photochemistry

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1 / 40

What is the term for a substance that absorbs light and initiates a photochemical reaction?

2 / 40

What is the term for the release of light energy by a molecule after absorbing photons?

3 / 40

Which type of reaction involves the addition of hydrogen atoms to a molecule by the absorption of light energy?

4 / 40

Which type of molecule absorbs light in the visible region of the electromagnetic spectrum?

5 / 40

Which type of reaction involves the transfer of an electron from one molecule to another by the absorption of light energy?

6 / 40

Which type of reaction involves the addition of an atom or group to a molecule by the absorption of light energy?

7 / 40

What is the term for a substance that increases the rate of a photochemical reaction without being consumed?

8 / 40

Which type of molecule absorbs light in the ultraviolet region of the electromagnetic spectrum and emits light in the visible region?

9 / 40

Which type of molecule absorbs light in the infrared region of the electromagnetic spectrum?

10 / 40

What is the term for a molecule that absorbs light and transfers its energy to another molecule, thus initiating a chemical reaction?

11 / 40

What is the term for a molecule that absorbs light and undergoes a chemical reaction as a result?

12 / 40

Which type of reaction involves the breaking of a chemical bond by the absorption of light energy?

13 / 40

What is the term for a chemical reaction that occurs when a molecule absorbs light energy?

14 / 40

Which type of reaction involves the rearrangement of atoms within a molecule by the absorption of light energy?

15 / 40

What is the process by which a molecule in an excited state transitions to a lower energy state through collisions with other molecules?

16 / 40

What is the process by which light energy is absorbed and leads to chemical changes in a molecule?

17 / 40

What is the term for the phenomenon where a molecule in an excited singlet state returns to its ground state by releasing light?

18 / 40

Which type of molecule absorbs light in the visible and ultraviolet regions of the electromagnetic spectrum?

19 / 40

What is the process by which a molecule in an excited singlet state transitions to a lower energy singlet state by releasing light?

20 / 40

Which type of molecule absorbs light in the visible region of the electromagnetic spectrum and emits light in the infrared region?

21 / 40

Which type of reaction involves the breaking of a chemical bond in a molecule by the absorption of light energy and the subsequent formation of two radicals?

22 / 40

What is the term for a substance that absorbs light and emits light of a longer wavelength?

23 / 40

What is the process by which a photosensitizer absorbs light energy and initiates a chemical reaction?

24 / 40

Which type of molecule absorbs light in the ultraviolet region of the electromagnetic spectrum and emits light in the ultraviolet or visible region?

25 / 40

What is the term for the process by which a molecule in an excited singlet state transitions to a lower energy state without emitting light?

26 / 40

What is the term for a molecule that absorbs light and emits light of a longer wavelength after undergoing an intersystem crossing?

27 / 40

What is the term for a molecule that can transfer its energy to another molecule through collisions, thereby deactivating the excited state?

28 / 40

Which type of reaction involves the formation of a dimer or oligomer from two or more molecules by the absorption of light energy?

29 / 40

What is the term for the absorption of light energy by a molecule, followed by the emission of light of lower energy?

30 / 40

Which type of reaction involves the splitting of a molecule into smaller fragments by the absorption of light energy?

31 / 40

What is the term for the emission of light energy by a molecule after absorbing photons and undergoing intersystem crossing?

32 / 40

What is the term for the phenomenon where a molecule in an excited triplet state releases light after a delay following light absorption?

33 / 40

What is the term for the phenomenon where a molecule returns to its ground state by releasing heat energy?

34 / 40

What is the term for the process by which a molecule in an excited state returns to its ground state by releasing heat?

35 / 40

Which type of molecule absorbs light in the ultraviolet region of the electromagnetic spectrum?

36 / 40

What is the process by which a molecule in an excited state releases its energy as heat without emitting light?

37 / 40

What is the term for the phenomenon where a molecule in an excited state releases light after a delay following light absorption?

38 / 40

What is the term for the phenomenon where a molecule returns to its ground state after absorbing light energy?

39 / 40

Which type of reaction involves the transfer of energy from one molecule to another by the absorption of light energy?

40 / 40

Which type of molecule absorbs light in the ultraviolet region of the electromagnetic spectrum and emits light in the visible region?

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Photochemistry Flashcards

What is the process by which light energy is absorbed and leads to chemical changes in a molecule?

Photochemistry

What is the term for a molecule that absorbs light and undergoes a chemical reaction as a result?

Photosensitizer

Which type of reaction involves the breaking of a chemical bond by the absorption of light energy?

Photodissociation

What is the term for the phenomenon where a molecule returns to its ground state after absorbing light energy?

Fluorescence

What is the process by which a photosensitizer absorbs light energy and initiates a chemical reaction?

Photocatalysis

What is the term for the release of light energy by a molecule after absorbing photons?

Photoluminescence

Which type of reaction involves the addition of an atom or group to a molecule by the absorption of light energy?

Photoaddition

What is the term for a chemical reaction that occurs when a molecule absorbs light energy?

Photochemical reaction

What is the process by which a molecule in an excited state releases its energy as heat without emitting light?

Internal conversion

Which type of molecule absorbs light in the visible region of the electromagnetic spectrum?

Chromophore

What is the term for the absorption of light energy by a molecule, followed by the emission of light of lower energy?

Fluorescence

Which type of reaction involves the splitting of a molecule into smaller fragments by the absorption of light energy?

Photodissociation

What is the process by which a molecule in an excited singlet state transitions to a lower energy singlet state by releasing light?

Fluorescence

Which type of molecule absorbs light in the ultraviolet region of the electromagnetic spectrum?

Chromophore

What is the term for the phenomenon where a molecule in an excited state releases light after a delay following light absorption?

Phosphorescence

Which type of reaction involves the transfer of an electron from one molecule to another by the absorption of light energy?

Photoreduction

What is the term for a substance that increases the rate of a photochemical reaction without being consumed?

Photoinitiator

What is the process by which a molecule in an excited state transitions to a lower energy state through collisions with other molecules?

Quenching

Which type of molecule absorbs light in the infrared region of the electromagnetic spectrum?

Chromophore

What is the term for the phenomenon where a molecule returns to its ground state by releasing heat energy?

Internal conversion

Which type of reaction involves the formation of a dimer or oligomer from two or more molecules by the absorption of light energy?

Photodimerization

What is the term for the emission of light energy by a molecule after absorbing photons and undergoing intersystem crossing?

Phosphorescence

Which type of molecule absorbs light in the visible and ultraviolet regions of the electromagnetic spectrum?

Chromophore

What is the term for a molecule that can transfer its energy to another molecule through collisions, thereby deactivating the excited state?

Quencher

Which type of reaction involves the rearrangement of atoms within a molecule by the absorption of light energy?

Photoisomerization

What is the term for the phenomenon where a molecule in an excited triplet state releases light after a delay following light absorption?

Phosphorescence

Which type of molecule absorbs light in the ultraviolet region of the electromagnetic spectrum and emits light in the visible region?

Fluorophore

What is the term for a molecule that absorbs light and transfers its energy to another molecule, thus initiating a chemical reaction?

Photosensitizer

Which type of reaction involves the transfer of energy from one molecule to another by the absorption of light energy?

Energy transfer

What is the term for a substance that absorbs light and initiates a photochemical reaction?

Photosensitizer

Which type of molecule absorbs light in the visible region of the electromagnetic spectrum and emits light in the infrared region?

Fluorophore

What is the term for the process by which a molecule in an excited singlet state transitions to a lower energy state without emitting light?

Internal conversion

Which type of reaction involves the addition of hydrogen atoms to a molecule by the absorption of light energy?

Photoreduction

What is the term for the phenomenon where a molecule in an excited singlet state returns to its ground state by releasing light?

Fluorescence

Which type of molecule absorbs light in the ultraviolet region of the electromagnetic spectrum and emits light in the ultraviolet or visible region?

Fluorophore

What is the term for the process by which a molecule in an excited state returns to its ground state by releasing heat?

Internal conversion

Which type of reaction involves the breaking of a chemical bond in a molecule by the absorption of light energy and the subsequent formation of two radicals?

Photodissociation

What is the term for a substance that absorbs light and emits light of a longer wavelength?

Phosphor

Which type of molecule absorbs light in the ultraviolet region of the electromagnetic spectrum and emits light in the visible region?

Fluorophore

What is the term for a molecule that absorbs light and emits light of a longer wavelength after undergoing an intersystem crossing?

Phosphor

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