Solids - Inorganic Chemistry - Chemistry Previous Year Questions

1

2008 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2008

The lattice parameters for a monoclinic crystal are

A

a ≠ b ≠ c ; α = γ = 90°

B

a = b ≠ c ; α ≠ β ≠ γ

C

a ≠ b ≠ c ; α ≠ β ≠ γ

D

a = b = c ; α = γ = 90°

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2

2008 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2008

NaCl is crystallised by slow evaporation of its aqueous solution at room temperature. The correct statement is

A

The crystals will be non-stoichiometric

B

The crystals should have Frenkel defects

C

The percentage of defects in the crystals will depend on the concentration of the solution and its rate of evaporation

D

The nature of defects will depend upon the concentration of the solution and its rate of evaporation

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3

2008 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2008

CaTiO3 has a perovskite crystal structure. The coordination number of titanium in CaTiO3 is

A

9

B

6

C

3

D

12

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4

2008 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2008

When NiO is heated with a small amount of Li₂O in air at 1200 °C, a non-stoichiometric compound Li_xNi_1-xO is formed. This compound is

A

an n-type semiconductor containing only Ni³⁺

B

an n-type semiconductor containing Ni³⁺ and Ni²⁺

C

a p-type semiconductor containing Ni²⁺ and Ni³⁺

D

a p-type semiconductor containing only Ni³⁺

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5

2008 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2008

Among the compounds Fe3O4, NiFe2O4 and Mn3O4

A

NiFe₂O₄ and Mn₃O₄ are normal spinels

B

Fe₃O₄ and Mn₃O₄ are normal spinels

C

Fe₃O₄ and Mn₃O₄ are inverse spinels

D

Fe₃O₄ and NiFe₂O₄ are inverse spinels

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6

2008 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2008

The condition for observing diffraction from the nickel surface is

A

\(\lambda >> 2d\)

B

\(\lambda \leq 2d\)

C

\(\lambda \leq ad\)

D

\(\lambda \geq ad\)

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7

2009 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2009

The coordination number of the Ba\(^{2+}\) ions in barium fluoride is 8. The coordination number of the fluoride ion is

A

8

B

4

C

1

D

2

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8

2009 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2009

The X-ray powder pattern of NaCl shows an intense cone at θ = 15.87° using X-rays of wavelength 1.54 × 10^-8 cm. The spacing between the planes (in Å) of NaCl crystal is

A

1.41

B

2.82

C

4.23

D

5.63

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9

2012 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2012

The complex with inverse-spinel structure is

A

Co₃O₄

B

Fe₃O₄

C

MgAlO₄

D

Mn₃O₄

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10

2013 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2013

A crystal has the lattice parameters a ≠ b ≠ c and α = β = γ = 90°. The crystal system is

A

tetragonal

B

monoclinic

C

cubic

D

orthorhombic

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11

2013 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2013

The increasing order of melting points of the halides NaCl, CuCl and NaF is

A

CuCl < NaCl < NaF

B

NaF < NaCl < CuCl

C

NaF < CuCl < NaCl

D

CuCl < NaF < NaCl

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12

2013 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2013

A metal crystallizes in face-centered cubic lattice with a lattice parameter of 4.20 Å. The shortest atom to atom contact distance in the lattice is

A

4.20 Å

B

2.97 Å

C

2.42 Å

D

2.10 Å

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13

2014 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2014

Molybdenum crystallizes in a bcc structure with unit cell dimensions of 0.314 nm. Considering the atomic mass of molybdenum to be 96, its density (in kg m⁻³) is ______________

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14

2014 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2014

MnCr₂O₄ is

A

normal spinel with total CFSE of –15.5 Dq

B

inverse spinel with total CFSE of –15.5 Dq

C

normal spinel with total CFSE of –24 Dq

D

inverse spinel with total CFSE of –24 Dq

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15

2016 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2016

When crystals of sodium chloride are heated in the presence of sodium vapor, they turn yellow. This is due to the formation of

A

Schottky defects

B

Frenkel defects

C

centres

D

H-centres

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16

2019 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2019

Among the following compounds, a normal spinel is

A

MgFe₂O₄

B

ZnFe₂O₄

C

CoFe₂O₄

D

CuFe₂O₄

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17

2019 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2019

The INCORRECT statement about the solid-state structure of CsCl and CaF₂ is:

A

Cations in both solids exhibit coordination number 8.

B

CsCl has bcc type structure and CaF₂ has cubic close pack structure.

C

Radius ratio for Cs/Cl and Ca/F is 0.93 and 0.73, respectively.

D

Both exhibit close pack structure.

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18

2023 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2023

The packing efficiency (in %) of spheres for a body-centered cubic (bcc) lattice is approximately

A

74

B

68

C

60

D

52

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19

2024 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2024

The compound(s) which show(s) the perovskite structure in solid state is (are)

A

CaTiO₃

B

NiFe₂O₄

C

Fe₃O₄

D

CsPbI₃

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20

2025 · Chemistry · Inorganic Chemistry · Solids

Chemistry (CY) 2025

Upon cooling from room temperature, the magnetic susceptibility of MnO slowly increases until 118 K, and then it decreases. This phenomenon is known as

A

ferromagnetism

B

paramagnetism

C

antiferromagnetism

D

ferrimagnetism

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