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Crystal Defects and Electrical Neutrality Quiz

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Crystal Defects and Electrical Neutrality Quiz

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Questions and Answers

What type of crystal defect occurs when a particle is missing from its regular site in the crystal lattice?

Frenkel defect

Self-interstitial defect

Vacancy defect (correct)

Schottky defect

How are vacancies created in a crystal lattice?

By increasing pressure

By heating the substance (correct)

By adding extra particles

By cooling the substance

What can minimize the defects in a crystal lattice?

Heating the substance slowly (correct)

Cooling the substance rapidly

Increasing the crystallization rate

Creating self-interstitial defects

At what temperature are ideal crystals with no imperfections possible?

Absolute zero (A) Signup and view all the answers

Which type of crystal defect involves additional particles being present in the crystal lattice?

Self-interstitial defect (D) Signup and view all the answers

What happens to defects in a crystal when crystallization occurs at a faster rate?

Defects increase (C) Signup and view all the answers

What happens to the mass of a substance in a vacancy defect?

It decreases (D) Signup and view all the answers

What is the impact of a vacancy defect on the density of a substance?

The density decreases (A) Signup and view all the answers

What type of defect results when a particle is displaced within a crystal structure?

Interstitial defect (C) Signup and view all the answers

In a self interstitial defect, what occupies the interstitial sites in a crystal structure?

Particles from lattice points themselves (C) Signup and view all the answers

What happens to the mass of a substance in a self interstitial defect?

It remains unchanged (D) Signup and view all the answers

How does a self interstitial defect impact the density of a substance?

The density remains unchanged (A) Signup and view all the answers

Why is Frenkel defect not found in pure alkali metal halides?

The cations of alkali metals are too large to occupy interstitial spaces. (A) Signup and view all the answers

How can Frenkel defect be described in terms of vacancy and interstitial defects?

A combination of a vacancy defect and an interstitial defect. (D) Signup and view all the answers

What type of defect arises when the ratio of cations to anions becomes different from that indicated by the chemical formula?

Metal deficiency defect (D) Signup and view all the answers

In a nonstoichiometric compound with metal deficiency defects, what changes without affecting the crystal structure?

Stoichiometry (B) Signup and view all the answers

What kind of impurities can create vacancies in ionic solids?

Impurities with different oxidation states than host ions (A) Signup and view all the answers

Why do pure alkali metal halides not exhibit Frenkel defects?

The size of alkali metal cations prevents them from occupying interstitial spaces. (D) Signup and view all the answers