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Standard VIII
Chemistry
Question

Match the column A and B
Column AColumn B
(i) Thermoplastics(a) Handles of utensils, floor tiles
(ii) Thermosetting plastics(b) Melamine
(iii) Biodegradable(c) Teflon
(iv) Fire proof plastic(d) Wood
(v) Oil and water do not stick(e) Combs, containers

  1. i-e, ii-a, iii-d, iv-b, v-c
  2. i-d, ii-e, iii-a, iv-b, v-c
  3. i-c, ii-b, iii-a, iv-e, v-d
  4. i-a, ii-d, iii-b, iv-c, v-e

A
i-d, ii-e, iii-a, iv-b, v-c
B
i-e, ii-a, iii-d, iv-b, v-c
C
i-a, ii-d, iii-b, iv-c, v-e
D
i-c, ii-b, iii-a, iv-e, v-d
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Solution
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Thermoplastic materials are those materials that are made of polymers linked by intermolecular interactions or van der Waals forces, forming linear or branched structures.

Melamine is a versatile material. It resists fire and can tolerate heat better than other plastics. It is used for making fire-resistive uniforms, floor tiles, kitchenware and fabrics which resist fire.

Thermosetting plastics are generally strong and resistant to heat, but they melt the first time they are heated to a high enough temperature and harden (set) permanently when cooled. They can never be melted or reshaped again.

They are used in situations where resistance to heat is important, e.g. on kitchen work surfaces, good-quality plastic cups, saucepan handles and plug casings. Wood is biodegradable

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Similar Questions
Q1
Match the column A and B
Column AColumn B
(i) Thermoplastics(a) Handles of utensils, floor tiles
(ii) Thermosetting plastics(b) Melamine
(iii) Biodegradable(c) Teflon
(iv) Fire proof plastic(d) Wood
(v) Oil and water do not stick(e) Combs, containers

View Solution
Q2
Match the columns I and II:
(A)(a) - (ii), (b) -(V), (c)-(iii),(d) -(i);(e)-(iv)
(B)(a)- (v), (b) -(iv), (c)-(iii),(d) -(ii),(e)-(i)
(C)(a) - (v), (b) -(i), (c) -(ii), (d) -(iv), (e) -(iii)
(D) (a)-(iii), (b)- (ii), (c) -(i), (d) -(v), (e) -(iv)
(E)(a)-(i), (b) -(iv), (c) -(iii), (d) -(v), (e) -(ii)
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Q3
Match the importance of these tissues :
(i) → (d), (ii) → (b), (iii) → (a), (iv) → (c)
(i) → (b), (ii) → (d), (iii) → (c), (iv) → (a)
(i) → (c), (ii) → (b), (iii) → (a), (iv) → (d)
(i) → (d), (ii) → (c), (iii) → (a), (iv) → (b)
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Q4

Match the following:

(i)Can have variable composition of constituent elements(A)Compound(ii)___ is new substance formed due to reaction of two constituent elements(B)Mixture(iii)Constituent elements can be separated easily(C)Element(iv)Can be separated only by chemical or electrochemical reactions(v)Composition is always fixed(vi)Shows properties of constituent elements
The correct pairs are:-


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Q5

Match the following:


(i)Water(A)Compound(ii)Hydrogen(B)Element(iii)Salt(iv)Gold(v)Carbon dioxide(vi)Iron
The correct pairs are:-


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