Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 22: Problem 8

"Only the fraction of incident light that is absorbed by the substance can bring about a chemical change." This is the (a) first law of photochemistry (b) second law of photochemistry (c) third law of photochemistry (d) none of these

Short Answer

Expert verified
The correct answer is (a) first law of photochemistry.

Step by step solution

01

Analyze the statement

The given statement refers to the idea that for a chemical change to occur in a substance due to light (photochemical reactions), the light must be absorbed by the substance. This isn't speaking about the number of molecules participating in the reaction, just the necessity of absorption of light for the reaction.
02

Identify the law

By referring to the laws of photochemistry, it can be seen that the described scenario corresponds to the First law of photochemistry (Grotthuss–Draper law) which states: 'only that light which is absorbed by a system can bring about a photochemical change'.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

"It is only the absorbed light radiations that are effective in producing a chemical reactions." This is the statement of (a) Lambert law (b) Lambert-Beer law (c) Grotthus-Draper law (d) Stark-Einstein law

The light emitted in a chemiluminescent reaction is also called (a) cold light (b) hot light (c) bright light (d) none of these

"In a photochemical reaction, each molecule of the reacting substance absorbs a single photon of radiation causing the reaction and is activated to form the products." This is the statement of (a) Lambert-Beer's law (b) Grotthus-Draper law (c) Stark-Einstein law (d) Lambert's law

The number of molecules reacted or formed per photon of light absorbed is called (a) yield of the reaction (b) quantum efficiency (c) quantum yield (d) quantum productivity

In some photochemical reactions, low quantum yield is obtained. It is due to (a) deactivation of reacting reaction (b) occurrence of reverse primary reaction (c) recombination of dissociated fragments (d) all of these
See all solutions

Recommended explanations on Chemistry Textbooks

Kinetics

Read Explanation

Ionic and Molecular Compounds

Read Explanation

Chemical Reactions

Read Explanation

Making Measurements

Read Explanation

Nuclear Chemistry

Read Explanation

Physical Chemistry

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free