Question

Q1. On the basis of the materials used in the given products, categorise the products as
‘Can be Recyled’ and ‘Cannot be Recycled’.
Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic
bowls, plastic covering on electrical wires, plastic chairs, electrical switches.
Q2. Give reasons for the following:
a) Cooking pans have plastic handles.
b) Electric wires have a plastic covering.
c) Melamine is used to make crockery.
d) Plastics are used in cars, aircrafts and spacecrafts.
e) Special plastic cookware is used in microwave ovens.
Q3. Multiple choice questions. Select the correct option.
(a) The plastic used for making water pipes :
(i) Melamine
(ii) PVC
(iii) Polyester
(iv) Bakelite
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(b) The non-stick coating on frying pans is that of a plastic called:
(i) PVC
(ii) Bakelite
(iii) Melamine
(iv) Teflon
(c) Which of these is thermosetting plastic?
(i) Acrylic
(ii) PET
(iii) PVC
(iv) Teflon
(d) Plastics are generally made from
(i) coal
(ii) petroleum
(iii) plant products
(iv) kerosene
Q4. Compare and contrast thermoplastics and thermosetting plastics . (any 3 points)
Q5. Draw the diagram showing the presence of linear polymers in a thermoplastic and cross –
linked polymers in a thermosetting plasti

Answer 1

Answer:

give a short ques bro

Explanation:

Answer 2

Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic

bowls can be recycled.

plastic covering on electrical wires, plastic chairs, electrical switches cannot be recycled.

Q2. Give reasons for the following:

a) Cooking pans have plastic handles.

Because plastic handle cannot affect the catcher's hand when heat is given to the pan.

b) Electric wires have a plastic covering. For proper covering , if not covered properly then it can result in danger.

Plastics are used in cars, aircrafts and spacecrafts. Because they are light in weight.

Special plastic cookware is used in microwave ovens. Because if we keep silver vessels then the oven can blast.

Q3. Multiple choice questions. Select the correct option.

(a) The plastic used for making water pipes :

(i) Melamine

(ii) PVC ✓

(iii) Polyester

(iv) Bakelite

(b) The non-stick coating on frying pans is that of a plastic called:

(i) PVC

(ii) Bakelite

(iii) Melamine

(iv) Teflon ✓

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