MCQ 4011 Mark
Sodium has body centred packing. If the distance between two nearest atoms is 3.7 Å, then its lattice parameter is
- A4.8 Å
- ✓4.3 Å
- C3.9 Å
- D3.3 Å
Answer
View full question & answer→Correct option: B.
4.3 Å
4.3 Å
Questions · Page 9 of 9
M.C.Q (1 Marks)
MCQ 4021 Mark
What is the net force on a $\mathrm{Cl}^{-}$ placed at the centre of the bcc structure of CsCl
- ✓Zero
- B$ke ^2 / a ^2$
- C$k^2 a^2$
- DData is incomplete
Answer
View full question & answer→Correct option: A.
Zero
(a) Zero
MCQ 4031 Mark
The laptop PC’s modern electronic watches and calculators use the following for display
- ASingle crystal
- BPoly crystal
- ✓Liquid crystal
- DSemiconductors
Answer
View full question & answer→Correct option: C.
Liquid crystal
Liquid crystal
MCQ 4041 Mark
A solid reflects incident light and it’s electrical conductivity decreases with temperature. The binding in this solids
- AIonic
- BCovalent
- ✓Metallic
- DMolecular
Answer
View full question & answer→Correct option: C.
Metallic
Metallic
MCQ 4051 Mark
Atomic radius of fcc is
- A$\frac{a}{2}$
- ✓$\frac{a}{2 \sqrt{2}}$
- C$\frac{\sqrt{3}}{4} a$
- D$\frac{\sqrt{3}}{2} a$
Answer
View full question & answer→Correct option: B.
$\frac{a}{2 \sqrt{2}}$
$\frac{a}{2 \sqrt{2}}$
MCQ 4061 Mark
The coordination number of Cu is
- A1
- B6
- C8
- ✓12
Answer
View full question & answer→Correct option: D.
12
12
MCQ 4071 Mark
Which of the following materials is non crystalline
- ACopper
- BSodium chloride
- ✓Wood
- DDiamond
Answer
View full question & answer→Correct option: C.
Wood
Wood
MCQ 4081 Mark
In which of the following ionic bond is present
- ✓NaCl
- BAr
- CSi
- DGe
Answer
View full question & answer→Correct option: A.
NaCl
NaCl
MCQ 4091 Mark
The expected energy of the electrons at absolute zero is called
- ✓Fermi energy
- BEmission energy
- CWork function
- DPotential energy
Answer
View full question & answer→Correct option: A.
Fermi energy
Fermi energy
MCQ 4101 Mark
The nature of binding for a crystal with alternate and evenly spaced positive and negative ions is
- ACovalent
- BMetallic
- CDipolar
- ✓Ionic
Answer
View full question & answer→Correct option: D.
Ionic
Ionic
MCQ 4111 Mark
For a crystal system, $a = b = c, a = b = g^1\ 90^\circ$, the system is
- ATetragonal system
- BCubic system
- COrthorhombic system
- ✓Rhombohedral system
Answer
View full question & answer→Correct option: D.
Rhombohedral system
Rhombohedral system
MCQ 4121 Mark
The temperature coefficient of resistance of a conductor is
- ✓Positive always
- BNegative always
- CZero
- DInfinite
Answer
View full question & answer→Correct option: A.
Positive always
Positive always
MCQ 4131 Mark
Potassium has a $\ce{bcc}$ structure with nearest neighbour distance $4.525 \mathring A .$ Its molecular weight is $39.$ Its density in $kg/m^3$ is
- ✓$900$
- B$494$
- C$602$
- D$802$
Answer
View full question & answer→Correct option: A.
$900$
$900$