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Passage
The crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.
Q.
Defect present in the crystal is of the type
- a)Schottky
- b)Frenkel
- c)metal excess
- d)metal deficiency
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
PassageThe crystal AB (rock salt structure) has m ole cular w eight 6....
AB is rock salt like structure, thus number of AB molecules per unit cell =4, a = 2y1/3 nm
Thus, there is excess of metal ions which increases mass hence the density.
Most Upvoted Answer
PassageThe crystal AB (rock salt structure) has m ole cular w eight 6....
Crystal Defects
In the given passage, the crystal AB is mentioned to have a rock salt structure. Crystal defects refer to irregularities or deviations from the perfect arrangement of atoms or ions in a crystal lattice. These defects can occur during the formation or growth of a crystal, and they significantly influence the properties and behavior of the crystal.
Types of Crystal Defects
There are several types of crystal defects, including point defects, line defects, and surface defects. Point defects involve the presence of vacancies, interstitial atoms, or impurity atoms within the crystal lattice. The two main types of point defects are Schottky defects and Frenkel defects.
Schottky Defects
Schottky defects occur in ionic crystals when equal numbers of cations and anions are missing from their lattice sites. This creates vacancies within the crystal lattice. Schottky defects are commonly found in compounds with high coordination numbers, such as rock salt structures. The absence of cations and anions maintains the electrical neutrality of the crystal.
Frenkel Defects
Frenkel defects occur when an ion is displaced from its lattice site and occupies an interstitial position within the crystal lattice. This defect is common in compounds with a large difference in ion size, such as zinc sulfide. Frenkel defects do not affect the electrical neutrality of the crystal.
Answer Explanation
In the given passage, the crystal AB is described to have a rock salt structure and a molecular weight of 6.02 y u, where y is an arbitrary unit in u. The minimum distance between cation and anion is given as y^(1/3) nm, and the observed density is 20 kg m^-3.
Considering the characteristics mentioned, we can conclude that the crystal AB has a metal excess defect. This is because the observed density of the crystal is lower than the expected density for a perfect crystal lattice. Metal excess defects occur when there is an excess of metal cations in the crystal lattice, leading to a decrease in density.
Therefore, the correct answer to the question is option 'C' - metal excess.
In the given passage, the crystal AB is mentioned to have a rock salt structure. Crystal defects refer to irregularities or deviations from the perfect arrangement of atoms or ions in a crystal lattice. These defects can occur during the formation or growth of a crystal, and they significantly influence the properties and behavior of the crystal.
Types of Crystal Defects
There are several types of crystal defects, including point defects, line defects, and surface defects. Point defects involve the presence of vacancies, interstitial atoms, or impurity atoms within the crystal lattice. The two main types of point defects are Schottky defects and Frenkel defects.
Schottky Defects
Schottky defects occur in ionic crystals when equal numbers of cations and anions are missing from their lattice sites. This creates vacancies within the crystal lattice. Schottky defects are commonly found in compounds with high coordination numbers, such as rock salt structures. The absence of cations and anions maintains the electrical neutrality of the crystal.
Frenkel Defects
Frenkel defects occur when an ion is displaced from its lattice site and occupies an interstitial position within the crystal lattice. This defect is common in compounds with a large difference in ion size, such as zinc sulfide. Frenkel defects do not affect the electrical neutrality of the crystal.
Answer Explanation
In the given passage, the crystal AB is described to have a rock salt structure and a molecular weight of 6.02 y u, where y is an arbitrary unit in u. The minimum distance between cation and anion is given as y^(1/3) nm, and the observed density is 20 kg m^-3.
Considering the characteristics mentioned, we can conclude that the crystal AB has a metal excess defect. This is because the observed density of the crystal is lower than the expected density for a perfect crystal lattice. Metal excess defects occur when there is an excess of metal cations in the crystal lattice, leading to a decrease in density.
Therefore, the correct answer to the question is option 'C' - metal excess.
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PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer?
Question Description
PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer?.
PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer?.
Solutions for PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice PassageThe crystal AB (rock salt structure) has m ole cular w eight 6.02 y u, where y is an arbitrary unit in u. Also, given minimum distance between cation and anion = y 1/3 nm and observed density = 20 kg m-3.Q.Defect present in the crystal is of the typea)Schottkyb)Frenkelc)metal excessd)metal deficiencyCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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