Thermocol

Q. Identify the synthetic fibres based on the listed properties:​
A. Soft, warm and lightweight​: ____
B. Durable and water-resistant, made up of monomer ester: ​ ____
C. Shiny and smooth semi-synthetic fibre: ​ _____
D. Very strong, elastic and water-resistant​ : _____

Q. Should the handle and bristles of the toothbrush be made of the same material? Explain your answer.​

Q.

Why is it not advisable to use non-stick pans for cooking?

Q. <!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> Write some useful properties of thermocol. [3 Mark]

Q. Thermocol is a form of polystyrene.

1. True
2. False

Q. Which material is wrapped around the delicate items to prevent them from breaking?

1. Glass
2. Thermoplastics
3. Thermocol
4. Thermosets

Q. Why thermocol is used in packing delicate items?

1. carcinogenic
2. a good conductor of heat
3. biodegradable
4. a good shock absorber

Q. Write a short note on uses of mica

Q. Which of the following is a correct feature of thermocol.

1. Biodegradable
2. Heavy
3. Non-biodegradable.
4. Non-poisonous

Q. Which among the following takes the longest time to degrade?

1. Paper
2. Fruit peel
3. Clothes
4. Thermocol