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Potassium crystallises in a body centred cubic lattice with unit cell of length a = 5.20 . Which of the following statements is wrong?
  • a)
    The distance between the nearest neighbours is 4.50
  • b)
    The distance between the next nearest neighbours is 5.20
  • c)
    Potassium has 8 nearest neighbours.
  • d)
    Potassium has 8 next nearest neighbours.
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Potassium crystallises in a body centred cubic lattice with unit cell...
In a body centred unit cell the atoms touch along the body diagonal.
Body diagonal (4r) = √3a
The distance between the nearest neighbours(2r)
=
Hence (a) is correct.
The next nearest neighbours lie at the corners and the distance between them is equal to the edge length i.e., 5.20 .
Hence (b) is correct.
Each body centre touches 8 atoms at the corners. Hence (c) is correct.
Each atom has six next nearest neighbours. Hence (d) is incorrect.
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Read the passage given below and answer the following questions:The transition metals when exposed to oxygen at low and intermediate temperatures form thin, protective oxide films of up to some thousands of Angstroms in thickness. Transition metal oxides lie between the extremes of ionic and covalent binary compounds formed by elements from the left or right side of the periodic table. They range from metallic to semiconducting and deviate by both large and small degrees from stoichiometry. Since d-electron bonding levels are involved, the cations-exist in various valence states and hence give rise to a large number of oxides. The crystal structures are often classified by considering a cubic or hexagonal close-packed lattice of one set of ions with the other set of ions filling the octahedral or tetrahedral interstices. The actual oxide structures, however, generally show departures from such regular arrays due in part to distortions caused by packing of ions of different size and to ligand field effects. These distortions depend not only on the number of d-electrons but also on the valence and the position of the transition metal in a period or group.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

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Potassium crystallises in a body centred cubic lattice with unit cell of length a = 5.20 . Which of the following statements is wrong?a)The distance between the nearest neighbours is 4.50b)The distance between the next nearest neighbours is 5.20c)Potassium has 8 nearest neighbours.d)Potassium has 8 next nearest neighbours.Correct answer is option 'D'. Can you explain this answer?
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Potassium crystallises in a body centred cubic lattice with unit cell of length a = 5.20 . Which of the following statements is wrong?a)The distance between the nearest neighbours is 4.50b)The distance between the next nearest neighbours is 5.20c)Potassium has 8 nearest neighbours.d)Potassium has 8 next nearest neighbours.Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Potassium crystallises in a body centred cubic lattice with unit cell of length a = 5.20 . Which of the following statements is wrong?a)The distance between the nearest neighbours is 4.50b)The distance between the next nearest neighbours is 5.20c)Potassium has 8 nearest neighbours.d)Potassium has 8 next nearest neighbours.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Potassium crystallises in a body centred cubic lattice with unit cell of length a = 5.20 . Which of the following statements is wrong?a)The distance between the nearest neighbours is 4.50b)The distance between the next nearest neighbours is 5.20c)Potassium has 8 nearest neighbours.d)Potassium has 8 next nearest neighbours.Correct answer is option 'D'. Can you explain this answer?.
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