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The density of CaF2 (fluorite structure) is 3.18 gcm-3. The length of the side of the unit cell is

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Important Questions on Solid State

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Chemistry Crash Course JEE Main>Chapter 21 - Solid State>Level 2>Q 19
A crystal is made of particles X, Y and Z. X forms FCC packing Y occupies all the octahedral voids of X and Z occupies all the tetrahedral voids of X. If all the particles along one body diagonal are removed then the formula of the crystal would be-
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Chemistry Crash Course JEE Main>Chapter 21 - Solid State>Level 2>Q 20
In diamond, carbon atoms occupy FCC lattice points, as well as alternate tetrahedral voids. If the edge length of the unit cell is 356 pm, then the diameter of the carbon atom is:
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Chemistry Crash Course JEE Main>Chapter 21 - Solid State>Level 2>Q 21
Which of the following is correct?
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Chemistry Crash Course JEE Main>Chapter 21 - Solid State>Level 2>Q 22
Which of the following statements is false?
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Chemistry Crash Course JEE Main>Chapter 21 - Solid State>Level 2>Q 23
Paramagnetic substances are those in which the individual atoms, ions or molecules possess a permanent magnetic dipole moment. In the absence of an external magnetic field, the atomic dipoles of paramagnetic substances are as
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Chemistry Crash Course JEE Main>Chapter 21 - Solid State>Level 2>Q 24

Copper has a face-centred cubic structure with a unit-cell edge length of 3.61 Å. What is the size of the largest atom (in pm), which could fit into the interstices of the copper lattice without distorting it?

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[Hint: Calculate the radius of the smallest circle in the figure.]

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Chemistry Crash Course JEE Main>Chapter 21 - Solid State>Level 2>Q 25
A face-centred cubic solid of an element (atomic mass 60) has a cube edge of 4.0 Å Calculate its density.
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Chemistry Crash Course JEE Main>Chapter 21 - Solid State>Level 3>Q 1
An element X (atomic weight=125) crystallizes in a simple cubic lattice. The diameter of the largest atom A which can be placed in the void of the lattice of ‘X’ without disturbing its unit cell is 366 pm. The density of pure element X in g/cm3 is