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 Multiple Choice QuestionsMultiple Choice Questions

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1.

Which of the following compounds is metallic and ferromagnetic?

  • VO2

  • MnO2

  • TiO2

  • TiO2

347 Views

2.

Sodium metal crystallises in a body centred cubic lattice with a unit cell edge of 4.29 Å The radius of sodium atom is approximate:

  • 1.86 Å

  • 3.22Å

  • 5.72 Å

  • 5.72 Å

275 Views

3.

CsCl crystallises in body centred cubic lattice. If 'a' its edge length, then which of the following expression is correct?

  • straight r subscript Cs to the power of plus space plus straight r subscript Cl to the power of minus end subscript space equals space 3 straight a
  • straight r subscript Cs to the power of plus space plus straight r subscript Cl to the power of minus end subscript space equals space fraction numerator 3 straight a over denominator 2 end fraction
  • straight r subscript Cs to the power of plus space plus straight r subscript Cl to the power of minus end subscript space equals space fraction numerator square root of 3 over denominator 2 end fraction straight a
  • straight r subscript Cs to the power of plus space plus straight r subscript Cl to the power of minus end subscript space equals space fraction numerator square root of 3 over denominator 2 end fraction straight a
607 Views

4.

Lithium forms body centred cubic structure. The length of the side of its unit cell is 351 pm. Atomic radius of the lithium will be

  • 75 pm

  • 300 pm

  • 240 pm

  • 240 pm

315 Views

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5.

In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is:

  • A2

  • AB2

  • A2B3

  • A2B3

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6.

The edge length of a face centred cubic cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is 

  • 144 pm

  • 288 pm

  • 398 pm

  • 398 pm

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7.

Percentages of free space in cubic close packed structure and in body centred packed structure are respectively

  • 48% and 26%

  • 30% and 26%

  • 26% and 32%

  • 26% and 32%

333 Views

8.

A metal crystallises in a face centred cubic structure. If the edge length of its unit cell is'a', the closest approach between two atoms in metallic crystal will be

  • 2a

  • 2 square root of 2 straight a
  • square root of 2 straight a end root
  • square root of 2 straight a end root
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9.

Copper crystallizes in fcc with a unit cell length of 361 pm. What is the radius of copper atom?

  • 108 pm

  • 127 pm

  • 157 pm

  • 157 pm

689 Views

10.

In a compound atoms of element Y from ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of the compound will be 

  • X4Y3

  • X2Y3

  • X2Y

  • X2Y

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