Plastics

Q.

Explain why plastic containers are used to store many chemicals? [1 MARK]

Q.

What are the characteristics of plastic?

Q. Based on their structure, all plastics are linear in nature.

1. True
2. False

Q.

What are the different coating techniques?

Q.

Which of the following are the properties of plastic?

1. Non-reactive, non-conductive.

2. Strong, durable, heavy.

3. Strong, durable, light.

4. Weak, durable, heavy.

Q. The coating on modern non-stick cookware and electric iron is made up of _________.

1. Teflon
2. Polyester
3. Rayon
4. Terrycot

Q. Which of the following are the characteristics of plastics?

1. Non-reactive
2. Heavy
3. Durable
4. Cheap

Q.

Which of the following represents the correct match for items in Column A with those in Column B.
$$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{I. Nylon}& \text{(i) Thermoplastic}\\ \text{II. PVC}& \text{(ii) Thermosetting plastic}\\ \text{III. Bakelite}& \text{(ii) Fiber}\end{array}$$

1. I-(iii), II-(i), III-(ii)

2. I-(ii), II-(i), III-(iii)

3. I-(ii), II-(iii), III-(i)

4. I-(iii), II-(ii), III-(i)

Q.

Write down the properties of plastic which make it a material of choice. [3 MARKS]

Q.

What are polycot and polywool? Is PET similar to them? [3 Marks]

Q. Write few useful properties of plastics.

Q.

Plastic containers cannot be used to store chemicals.

1. True

2. False

Q.

What are the seven types of plastics?

Q.

Plastics are heavier than metals, so they are used in cars, aircrafts and spacecrafts.

1. True

2. False

Q.

A synthetic fibre which looks like silk is obtained by chemical treatment of wood pulp. It is, therefore, known as artificial silk. What is its common name?

Q.

Write a short note on properties of plastics. [3 MARKS]

Q.

Question 3 (c)
Like synthetic fibres, plastic is also a _________.

Q. Plastics are not having high melting point so how it is useful to those who were living in warn areas?

Q.

Match the entries of column I with column II

Polymer	Uses
(a) Polyvinyl chloride	(i) Used to manufacture unbreakable crockery
(b) Polythene	(ii) Used for insulation of electrical wires
(c) Bakelite	(iii) Used to manufacture food packets
(d) Melamine	(iv) Used to manufacture electrical switches

1. (a) - (ii), (b) - (iii), (c) - (i), (d) - (iv)

2. (a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)

3. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)

4. (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)

Q.

Question 10
Give examples to show that plastics are non-corrosive in nature.

Q.

Question 5
Explain why plastic containers are favoured for storing food.

Q.

74 (v) Why is silicone used in manufacture of non - stick pans?

Q. Which of the following are properties of plastics?

1. Water-resistant
2. Corrosion-resistant
3. Biodegradable
4. Environment friendly

Q.

Explain why plastic containers are used to store many chemicals? [1 MARK]

Q. Explain the difference between thermoplastic and thermosetting plastics.

Q.

Assertion:- Plastics are not environment-friendly still, they are used. Choose the correct reason(s) for this assertion.

1. They are environmental friendly.

2. They don't break like glass, are unreactive, cheap and strong.

3. They conduct electricty and heat.

4. They can be decomposed very easily.

Q.

What is the maximum temperature for Silicone Bakeware?

Q. Mention the correct one of the 5 Rs that pertains to each of the following measures:
A. Using cloth bag instead of a plastic bag:
B. Using waste plastic cans as storage containers:
C. Using plastic waste for power generation:
D. Processing waste plastic bottles into fabrics:

Q.

Three Rs include ________, recycle and reuse.

Q. Question 7
Which of the following is not a common property of plastics?

(a) Non-reactive
(b) Light in weight
(c) Durable
(d) Good conductor of electricity