The flame colours of metal ions are due to
- Frenkel defect
- Shotkky defect
- metal deficiency defect
- metal excess defect
The Correct Option is D
Solution and Explanation
Top Questions on Imperfections in Solids
- The incorrect statement about the imperfections in solids is:
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Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
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- Photosynthesis in higher plants
- Which gas is present predominantly in biogas
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- Match the following column I with column II.
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- cloning
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
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- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
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Concepts Used:
Imperfections in Solids
Any irregularity in the pattern of crystal arrangement in a solid lattice is called imperfection in solids. The occurrence of defects takes place when crystallization (the process of formation of crystals) occurs at a very fast or at an intermediate rate.
Basically, defects fall out in two forms:
- Point Defect
When the irregularities exist from the ideal arrangement around a point or an atom in solids, the defect is known as a point defect. Types of point defects are:
- Stoichiometric defects
- Non-stoichiometric defects
- Impurity defects
- Line Defect
When the deviation from the ideal arrangement exists in the entire row of lattice points, the defect is called line defect.