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MEC681 Quiz 1

Authored by PROFESOR HYIE

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MEC681 Quiz 1
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5 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which of the following is nondirectional bonding?

covalent bonding

ionic bonding

Van der Waals bonding

hydrogen bonding

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Why diamond is much harder than graphite although both are made from carbon?

Both have covalent bonding but diamond has giant covalent bonding.

Carbon atom bonds to four covalent bonds but diamond has giant structure.

Diamond forms tetrahedral structure while Graphite forms hexagonal structure.

Each carbon atom is the same distance to each of its neighboring carbon atoms in graphite but not for diamond.

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which of the following is not true for FCC structure?

No of atom per unit cell is 4.

Coordination number is same with HCP structure.

Examples of materials having FCC structure is silver.

The packing density is better than HCP structure.

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

What is the crystallographic plane as shown in the figure?

(100)

(010)

(001)

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the difference between amorphous solid and crystalline solid?

Crystalline solid has equally strong bond but not for amorphous solid.

Amorphous solid has sharp melting point but not for crystalline solid

Crystalline solid has disorder arrangement of atoms which make it anisotropic

Amorphous solid has order arrangement of atoms which make it isotropic.

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