Quiz 8 for Class 12 Chemistry Chapter 1 Solid State

April 4, 2022July 8, 2022 dev mcq quiz, solid state

Quiz 8 for Class 12 Chemistry Chapter 1 Solid State

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Quiz 8 : Solid State - Class 12 Chemistry

Negative Marking :- No

Weightage per Question :- 1 Mark

Number of Questions :- 15

Duration of Quiz :- 15 min

1 / 15

1) The number of tetrahedral and octahedral voids in a CCP array of 100 atoms are respectively:

a) 200 and 200

b) 200 and 100

c) 100 and 100

d) 100 and 200

2 / 15

2) Iodine molecules are held in the crystal lattice by ________

a) Coulombic forces

b) Covalent bonds

c) Dipole-dipole forces

d) London forces

3 / 15

3) When electrons are trapped into the crystal in anion vacancy, the defect is known as:

a) Metal deficient defect

b) F-centres

c) Frenkel defect

d) Schottky defect

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4) The coordination number of metal crystallises in a HCP arrangement is :

a) 6

b) 8

c) 12

d) 10

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5) A particular solid is very hard and has a high melting point. In solid state, it is a non-conductor and its melt is a conductor of electricity. Classify the solid.

a) Covalent solid

b) Molecular solid

c) Ionic solid

d) Metallic solid

6 / 15

6) Which of the following statement is incorrect about crystalline solids ?

a) Crystalline solids have definite enthalpy of fusion.

b) Solid SO ₂] is a polar molecular solid

c) Crystalline substances are anisotropic

d) All covalent solids are poor conductor of electricity and are insulator

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7) The number of carbon atoms per unit cell of the diamond unit cell is:

a) 8

b) 4

c) 6

d) 2

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8) Which of the following compounds show both Frenkel and Schottky defects ?

a) NaCl

b) KCl

c) AgBr

d) AgCl

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9) Aluminium has FCC structure. The length of the unit cell is 404 pm. If the density of the metal is 2.7 g/cc, the molar mass of Al atom is:

a) 26.10 gm/mol

b) 27.80 gm/mol

c) 26.80 gm/mol

d) 28.46 gm/mol

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10) An ionic solid, 'AB' crystallises in BCC lattice with edge length equal to 387 pm. The distance between two oppositely charged ions in the lattice is:

a) 250 pm

b) 335 pm

c) 300 pm

d) 200 pm

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11) CsBr crystallises in a BCC lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 u and that of Br = 80 u. The density of CsBr is:

a) 4.25 gm/cc

b) 8.25 gm/cc

c) 0.425 g/cc

d) 42.5 gm/cc

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12) Which one of the following is a covalent crystal ?

a) Quartz

b) Rock salt

c) Dry ice

d) Ice

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13) One unit cell of NaCl contains:

a) 1 Na ⁺ and 1 Cl ^–

b) 4 Na ⁺ and 4 Cl ^–

c) 6 Na ⁺ and 6 Cl ^–

d) 2 Na ⁺ and 2 Cl ^–

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14) Which of the following is not true about the ionic solids ?

a) Bigger ions form the close packed structure.

b) Smaller ions occupy either the tetrahedral or the octahedral voids depending upon their size.

c) Occupation of all the voids is not necessary.

d) The fraction of octahedral or tetrahedral voids occupied depends upon the radii of the ions occupying the voids.

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15) A particular solid is very hard and has a high melting point. It may decompose before melting. Classify the solid.

a) Molecular solid

b) Ionic solid

c) Metallic solid

d) Covalent solid

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Quiz 8 for Class 12 Chemistry Chapter 1 Solid State

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