Glass

Q.

Glass is made up of

1. Limestone

2. Soda ash

3. Sand

4. Carbon

Q.

What is the role of limestone in the production of cement?

1. Lime stone gives the colour to the cement

2. Limestone is the main binder for mortar mix

3. Limestone is cheaper than clay

4. None of the choices

Q.

Why ice is a crystalline compound?

Q.

Explain the following term:

Pyrex glass

Q. Which of the following substance is a good conductor of electricity?

1. Diamond
2. Argon
3. Graphite
4. Glass

Q. ___ glass is used to make laboratory apparatus.

1. Lead
2. Borosilicate
3. Optical
4. Processed

Q. Which of the following is not a property of glass?

1. Hard
2. Brittle
3. Amorphous
4. Flexible

Q. Identify the raw material used in the manufacturing of glass.

1. Limestone
2. Soda ash
3. Silica
4. All of these

Q. Which of the following is a super-cooled liquid?

1. Glass
2. Ammonia
3. Wood
4. Ice cream

Q. Question 6 (b)
Give reasons for the following.
Immersion rods for heating liquids are made up of metallic substances.

Q.

What is the chemical composition of glass?

1. (AlO2)

2. (SiO4)

3. (SiO2)

4. (CaO2)

Q. Which of the following statements is true about glass?

1. Arrangement of silicate units is similar to that of solid state.
2. Arrangement of silicate units is similar to that of liquid state.
3. It has low viscosity and hence is not a true solid.
4. It has high viscosity with sharp melting point and hence is a solid.

Q. List any four properties of glass.

Q. Which of the following are not transparent?

1. Paper sheet
2. Air
3. Water
4. Plant
5. Wall
6. Lens
7. Book
8. Clear glass
9. Butter

Q.

Why are glasses called supercooled liquids?

Q. Glass used for making laboratory apparatus is:

1. pyrex glass
2. hard glass
3. soft glass
4. safety glass

Q. Which of the following are not transparent?

1. Wall
2. Book
3. Plant
4. Paper sheet
5. Lens
6. Water
7. Clear glass
8. Butter
9. Air

Q.

The glass which appears dark in sunlight and clear in dark is known as

1. Pyrex

2. Jema glass

3. Flint glass

4. None of these

Q. Which of the following are not transparent?

1. Clear glass
2. Air
3. Paper sheet
4. Plant
5. Wall
6. Lens
7. Water
8. Butter
9. Book

Q. Glass is a:

1. crystalline solid
2. solid having a definite melting point
3. supper cooled liquid
4. chemical compound

Q. The phenomenon in which white transparent crystal changes into white powder is called :

1. Deliquescence
2. Efflorescence
3. Allotropy
4. Sublimation