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Chemistry > Glass > Flashcards

Glass Flashcards

1
Q

Which of the following is not a type of glass

  1. Soda Lime
  2. Potash Lead
  3. Potash Lime
  4. Soda Bromide
A

Soda Bromide

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2
Q

Which of the following is not a property of glass
1. Glass can take up a high polish
2. Glass can absorb and refract light
3. Glass has definite crystal structure
4. Glass is available in many colours

A
  1. Glass has definite crystal structure
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3
Q

Soda Lime Glass is also known as

A

Soft Glass

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4
Q

Soda Lime Glass is a mixture of

A

Sodium Silicate and Calcium Silicate

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5
Q

Which of the following types of glass is also known as hard glass

A

Potassium Lime Glass
Also known as Bohemian Glass

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6
Q

Potash Lead Glass is also Known as

A

Flint Glass

Possess Bright Lustre
Used to manufacture artificial Gems, Lenses, Electric Bulbs

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7
Q

Potash Lime Glass is a mixture of

A

Calcium Silicate & Potassium Silicate

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8
Q

Common Glass is also Known as
1. Cup Glass
2. Flask Glass
3. Bottle Glass
4. Furnace Glass

A

Bottle Glass

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9
Q

Glass becomes Hard on heating
A. True
B. False

A

False

Glass becomes soft on heating and becomes mobile liquid finally

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10
Q

Which of the following is used for preparation of Soluble Glass

  1. Caustic Soda
  2. Magnesia
  3. Lead Oxide
  4. Quartz Sand
A

Quartz Sand

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11
Q

Broken or Waste glass is known as

A

Cullet

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12
Q

Which of the substance is not used as decolorizer in glass manufacturing

a. Potassium Carbonate
b. Antimony Oxide
c. Cobalt Oxide
d. Manganese Dioxide

A

Potassium Carbonate
It is a raw material in potassium Lime Glass.
All others are used as Decolorizer

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13
Q

True or False
a. Ferric oxide produces very Light yellow tint in glass
b. Ferrous oxide impart green colour to glass

A

Both are true

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14
Q

Process of slow and gradual cooling of glass article is known as

A

ANNEALING

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15
Q

Glass can be made opaque by grinding the surface of the glass with
A. Mortar
B. Flint
C. Alcohol
D. Emery

A

Emery

Also can be done chemically by applying HCL

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16
Q

Which material is added to glass in order to make it violet

A

Manganese Dioxide

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17
Q

Which material can produce green colour in glass

A

Chromium sesquioxide

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18
Q

Alternate layers of …… Plastic is present in bullet proof glass

A

Vinyl Resin

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19
Q

Glass is a mixture of
A. Non metallic silicates
B. Metallic Silicates
C. Metallic Acetates
D. Non metallic Acetates

A

Metallic Silicates

Glass is a super cooled liquid or mixture of various metallic Silicates
It is having infinite viscousity

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20
Q

Types of Glass

A

Soda Lime
Potash Lime
Potash Lead

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21
Q

Soda lime glass is primarily composed of which three materials?

a) Silica, Alumina, Calcium carbonate
b) Silica, Sodium carbonate, Calcium oxide
c) Silica, Potassium oxide, Calcium oxide
d) Silica, Sodium carbonate, Magnesium oxide

A

Silica, Sodium carbonate, Calcium oxide

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22
Q

What is the percentage of silica (SiO₂) in soda lime glass?

a) 20-30%
b) 50-60%
c) 70-75%
d) 85-90%

A

70-75%

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23
Q

Soda lime glass is commonly used for:

a) Laboratory glassware
b) Window panes and bottles
c) High-temperature resistant containers
d) Optical lenses

A

Window panes and bottles

24
Q

Which of the following is a disadvantage of soda lime glass?

a) High thermal shock resistance
b) Poor chemical resistance
c) High mechanical strength
d) Transparent appearance

A

Poor chemical resistance

25
Q

Which type of safety glass is made by laminating layers of glass with a plastic layer?

a) Tempered glass
b) Laminated glass
c) Borosilicate glass
d) Annealed glass

A

Laminated glass

26
Q

In the event of breakage, tempered safety glass:

a) Shatters into large sharp pieces
b) Breaks into small, blunt pieces
c) Cracks without shattering
d) Remains intact

A

Breaks into small, blunt pieces

27
Q

Laminated safety glass is mainly used in:

a) Car windshields
b) Laboratory equipment
c) Mirrors
d) Light bulbs

A

Car windshields

28
Q

The interlayer used in laminated safety glass is typically made of:

a) Polyvinyl butyral (PVB)
b) Polystyrene
c) Polycarbonate
d) Silicone

A

Polyvinyl butyral (PVB)

29
Q

Borosilicate glass is known for its:

a) High thermal resistance
b) Low optical clarity
c) Low thermal resistance
d) Low transparency

A

High thermal resistance

30
Q

The primary ingredient that distinguishes borosilicate glass from soda lime glass is:

a) Magnesium oxide
b) Boron oxide
c) Calcium oxide
d) Potassium oxide

A

Boron oxide

31
Q

Borosilicate glass is commonly used in:

a) Beverage containers
b) Laboratory equipment and cookware
c) Construction of buildings
d) Optical fibers

A

Laboratory equipment and cookware

32
Q

The thermal expansion coefficient of borosilicate glass is:

a) Higher than soda lime glass
b) Lower than soda lime glass
c) The same as soda lime glass
d) Higher than colored glass

A

Lower than soda lime glass

33
Q

The color in colored glass is typically achieved by adding:

a) Metallic oxides or salts
b) Organic dyes
c) Polymers
d) Silicon carbide

A

Metallic oxides or salts

34
Q

Which metal oxide gives a deep blue color to glass?

a) Cobalt oxide
b) Copper oxide
c) Manganese oxide
d) Chromium oxide

A

Cobalt oxide

35
Q

lass containing iron oxide impurities typically appears:

a) Red
b) Green
c) Yellow
d) Blue

36
Q

Selenium compounds are used to impart which color to glass?

a) Amber
b) Blue
c) Red or pink
d) Green

A

Red or pink

37
Q

Photosensitive glass undergoes a change when exposed to:

a) Heat
b) Light (UV or X-rays)
c) Electric current
d) Water

A

Light (UV or X-rays)

38
Q

The key property of photosensitive glass is:

a) Ability to change its color when exposed to light
b) High mechanical strength
c) High thermal resistance
d) Low transparency

A

Ability to change its color when exposed to light

39
Q

Photosensitive glass is often used in:

a) Decorative art pieces
b) Car windshields
c) Construction materials
d) Optical lenses

A

Decorative art pieces

40
Q

Which element is typically added to photosensitive glass to enable the photosensitive reaction?

a) Silver
b) Gold
c) Copper
d) Lead

41
Q

Which type of glass is preferred for making laboratory glassware that can withstand high temperatures?

a) Soda lime glass
b) Borosilicate glass
c) Colored glass
d) Photosensitive glass

A

Borosilicate glass

42
Q

Which glass type is the least resistant to thermal shock?

a) Borosilicate glass
b) Soda lime glass
c) Safety glass
d) Photosensitive glass

A

Soda lime glass

43
Q

Which glass is most suitable for UV-blocking applications, such as sunglasses?

a) Safety glass
b) Colored glass
c) Borosilicate glass
d) Photosensitive glass

A

Colored glass

44
Q

Which property of borosilicate glass makes it ideal for use in chemical laboratories?

a) High alkali content
b) High chemical resistance
c) Low transparency
d) Low melting point

A

High chemical resistance

45
Q

Which glass type is designed to shatter into small pieces upon breakage to reduce injury?

a) Borosilicate glass
b) Soda lime glass
c) Tempered safety glass
d) Colored glass

A

Tempered safety glass

46
Q

Chromatic glass is used in:
a) ICU and meeting rooms
b) Aquariums
c) Mobile screen protectors
d) Floors

A

ICU and meeting rooms

47
Q

The appearance of potash-lime glass in colour is:
a) Black
b) Green to colourless
c) Reddish brown
d) White

A

Green to colourless

48
Q

Which forming method is used for the production of hollow glasses?
a) Blowing
b) Pressing
c) Drawing
d) Casting

49
Q

Which method of forming cannot be used to produce sheet glass?
a) Floating
b) Rolling
c) Drawing
d) Casting

50
Q

The temperature at which a non-crystalline material transforms from a supercooled liquid to rigid glass is __________
a) Melting point
b) Glass transition temperature
c) Boiling point
d) Crystalline temperature

A

Glass transition temperature

Glass transition temperature is defined as that temperature at which a change from supercooled liquid state to stiff glass occurs. Below this temperature, the glass structure remains frozen while retaining characteristics of the liquid structure

51
Q

How does the addition of magnesia and alumina affect soda lime glass?
a) Enhances mechanical strength
b) Reduces porosity
c) Increases softening temperature
d) Improves chemical durability

A

Improves chemical durability

Sodium carbonate is added to fused quartz glass to lower glass transition temperature. However, this results in water solubility. In order to prevent this, magnesia (MgO) and alumina (Al2O3) are added, which increases chemical durability of the glass.

52
Q

What is the melting temperature of fused quartz?
a) 1112 oC
b) 1328 oC
c) 1525 oC
d) 1723 oC

A

1723 oC

Fused quartz is a glass made of chemically-pure silica. It has tremendous resistance to thermal shock and has a melting temperature of about 1723oC. However, it has a low thermal expansion and is generally hard.

53
Q

What is the Kovar type of glass?
a) Low expansion type
b) Low electrical loss type
c) Sealing type
d) Ultraviolet transmitting type

A

Sealing type

54
Q

Which type of glass is regarded as the most heat resistant?
a) Fused silica
b) Aluminosilicate
c) 96% silica
d) Borosilicate

A

Fused silica

55
Q

What is 96% silica glass used for?
a) Heat shield
b) Combustion tubes
c) Electronic tubes
d) Temperature thermometers

A

Heat shield

Chemistry (5 decks)

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