Properties of Glass

Q. Which type of glass is used in making lenses for cameras, telescopes and microscopes?

1. Optical glass

2. Colored glass

3. Processed glass

4. Silica glass

Q.

Glass is a bad conductor of heat and electricity.

1. True

2. False

Q. On falling glass breaks down into pieces. Which property of glass is depicted from this statement?

1. Transparency
2. Crystalline nature
3. Brittleness
4. Hardness

Q. Assersion (A): Glass is used in electric appliances.
Reason (R): Glass has an insulating property.

Choose the correct option.

1. A is correct and R is incorrect.
2. A is incorrect and R is correct.
3. Both are correct and R is the correct explanation of A.
4. Both are correct but R is not the correct explanation of A.

Q. Statement 1: Most of the light rays get absorbed in a transparent glass.
Statement 2: All the light rays pass through a coloured glass.

1. Both the statements are correct.
2. Statement 1 is correct and statement 2 is incorrect.
3. Statement 2 is incorrect and statement 1 is correct.
4. Both the statements are incorrect.

Q.

The hardness of solids is due to the fact that their particles:

1. cannot be separated at all

2. remain in a fixed place

3. are held close to each other by strong forces of attraction

4. The hardness of solids is due to the fact that their particles are held close to each other by strong forces of attraction.

Q.

Glass is a bad conductor of electricity.

1. True

2. False

Q.

Differentiate between transparent, translucent, and opaque materials.

Q.

Glass can be

1. coloured

2. transparent

3. polished

4. None of these

Q.

9) Water glass is used for making lenses of telescopes

1. True
2. False

Q. On falling glass breaks down into pieces, hence it is in nature.

1. transparent
2. crystalline
3. brittle

Q. Which of the following substance is an example of a translucent material?

1. Oily paper
2. Glass
3. Steel
4. Plastic

Q.

What are transparent, translucent, and opaque materials? Give one example of each.

Q.

Brittleness is not a property of glass.

1. False

2. True

Q. Write the properties of Glass.

Q.

Glasses are expensive to manufacture.

1. True

2. False

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Q. Which of the following non-metals is yellow in colour?

1. Iodine
2. Sulphur
3. Phosphorus
4. None of the above
   

Q. All of the following are true for glass except it is:

1. Non-degradable
2. Transparent
3. Opaque
4. Non-crystalline

Q.

Choose the odd one out. Give a reason for your answer.

1. Copper

2. Mercury

3. Glass

4. Aluminium

Q. Which of the following are true for glass?

1. Crystalline solid
2. Amorphous solid
3. Brittle
4. Flexible

Q. Which of the following substance is an example of a translucent material?

1. Steel
2. Oily paper
3. Glass
4. Plastic

Q. Which of the following is/are correct regarding a glass rod ?

1. Its a hard brittle solid
2. Its a transparent solid
3. Its a noncrystalline solid
4. all of these

Q. Which of the following substance is an example of a translucent material?

1. Plastic
2. Glass
3. Oily paper
4. Steel

Q. Answer the question in brief:
Why are most apparatus made of glass?

Q. Glasses are expensive to manufacture.

1. True
2. False

Q. Glass can be remoulded on heating.

1. True
2. False

Q. Which of the following are properties of a glass?

1. Opaque
2. Transparent
3. Electrical insulator
4. Crystalline

Q. How can coloured glass be obtained from molten glass? Name the chemical compounds to be added to molten glass to obtain the yellow coloured glass.