MISC 04 - Board Exam Problems Flashcards

1
Q

Gasoline

a. Newtonian
b. Dilatant
c. Pseudoplastic
d. Rheopectic
e. Thixotropic

A

a. Newtonian

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2
Q

Asphalt

a. Newtonian
b. Dilatant
c. Pseudoplastic
d. Rheopectic
e. Thixotropic

A

e. Thixotropic

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3
Q

Cream

a. Newtonian
b. Dilatant
c. Pseudoplastic
d. Rheopectic
e. Thixotropic

A

d. Rheopectic

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4
Q

Quicksand

a. Newtonian
b. Dilatant
c. Pseudoplastic
d. Rheopectic
e. Thixotropic

A

b. Dilatant

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5
Q

Ketchup

a. Newtonian
b. Dilatant
c. Pseudoplastic
d. Rheopectic
e. Thixotropic

A

c. Pseudoplastic

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6
Q

Which of the following surfactants has a HLB value of 18-20?

a. Emulsifiers
b. Solubilizers
c. Detergents
d. Wetting agents

A

b. Solubilizers

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7
Q

Settling rate is rapid

a. Flocculated
b. Deflocculated

A

a. Flocculated

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8
Q

Settling rate is slow

a. Flocculated
b. Deflocculated

A

b. Deflocculated

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9
Q

Sediment volume is high

a. Flocculated
b. Deflocculated

A

a. Flocculated

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10
Q

Sediment volume is low

a. Flocculated
b. Deflocculated

A

b. Deflocculated

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11
Q

Particle space is larger

a. Flocculated
b. Deflocculated

A

a. Flocculated

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12
Q

Particle space is smaller/non-uniform

a. Flocculated
b. Deflocculated

A

b. Deflocculated

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13
Q

More interparticle space

a. Flocculated
b. Deflocculated

A

a. Flocculated

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14
Q

Less interparticle space

a. Flocculated
b. Deflocculated

A

b. Deflocculated

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15
Q

Loose/easily dispersible sediments

a. Flocculated
b. Deflocculated

A

a. Flocculated

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16
Q

Compact/prone to caking sediments

a. Flocculated
b. Deflocculated

A

b. Deflocculated

17
Q

Clear supernatant liquid

a. Flocculated
b. Deflocculated

A

a. Flocculated

18
Q

Turbid supernatant liquid

a. Flocculated
b. Deflocculated

A

b. Deflocculated

19
Q

Stable suspension

a. Flocculated
b. Deflocculated

A

a. Flocculated

20
Q

Pharmaceutically elegant

a. Flocculated
b. Deflocculated

A

b. Deflocculated

21
Q

HLB value 1-3

a. Antifoaming
b. Emulsifiers (W/O)
c. Wetting agents
d. Emulsifiers (O/W)
e. Detergents
f. Solubilizers

A

a. Antifoaming

22
Q

HLB value 3-6

a. Antifoaming
b. Emulsifiers (W/O)
c. Wetting agents
d. Emulsifiers (O/W)
e. Detergents
f. Solubilizers

A

b. Emulsifiers (W/O)

23
Q

HLB value 7-9

a. Antifoaming
b. Emulsifiers (W/O)
c. Wetting agents
d. Emulsifiers (O/W)
e. Detergents
f. Solubilizers

A

c. Wetting agents

24
Q

HLB value 8-18

a. Antifoaming
b. Emulsifiers (W/O)
c. Wetting agents
d. Emulsifiers (O/W)
e. Detergents
f. Solubilizers

A

d. Emulsifiers (O/W)

25
HLB value 13-16 a. Antifoaming b. Emulsifiers (W/O) c. Wetting agents d. Emulsifiers (O/W) e. Detergents f. Solubilizers
e. Detergents
26
HLB value 15-20 a. Antifoaming b. Emulsifiers (W/O) c. Wetting agents d. Emulsifiers (O/W) e. Detergents f. Solubilizers
f. Solubilizers
27
Soap like a. Smectic b. Nematic c. Cholesteric
a. Smectic
28
Molecules tend to line themselves up into layers a. Smectic b. Nematic c. Cholesteric
a. Smectic
29
More restricted movement than nematic a. Smectic b. Nematic c. Cholesteric
a. Smectic
30
Thread like a. Smectic b. Nematic c. Cholesteric
b. Nematic
31
Simplest form of liquid crystal a. Smectic b. Nematic c. Cholesteric
b. Nematic
32
Crystal molecules have no orderly position and are free to move a. Smectic b. Nematic c. Cholesteric
b. Nematic
33
Chiral nematic a. Smectic b. Nematic c. Cholesteric
c. Cholesteric
34
Molecules being aligned and at a slight angle to one another a. Smectic b. Nematic c. Cholesteric
c. Cholesteric