Crystal structure

Crystal structure

University

20 Qs

quiz-placeholder

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Crystal structure

Crystal structure

Assessment

Quiz

Physics, Chemistry

University

Hard

Created by

Dr. phy

Used 68+ times

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The correct order of the packing efficiency in different types of unit cells is _______?

fcc < bcc < simple cubic

fcc > bcc > simple cubic

fcc < bcc > simple cubic

bcc < fcc > simple cubic

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following statements about lattices and unit cells is correct?

A unit cell contains a whole number of complete molecules

Lattice points are chosen to lie on atoms.

Lattice points all have identical surroundings

Unit cells are constructed by connecting adjacent lattice points to give the largest possible repeat unit.

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Consider the Bragg equation. If the value of the wavelength is doubled, which of the following is NOT true?

Bragg angles of reflections increase.

The d spacings become smaller.

The diffraction pattern expands.

Some previously accessible reflections can no longer be measured.

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Repeatable entity of a crystal structure is known as

Crystal

Lattice

Unit cell

Miller indices

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Coordination number for closest packed crystal structure

16

12

8

4

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Atomic packing factor is

Distance between two adjacent atoms

Projected area fraction of atoms on a plane

Volume fraction of atoms in cell

None

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Coordination number in simple cubic crystal structure

8

6

12

10

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