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Concept – Characteristics of Synthetic Fibre

Q1. How can we compare the strength of the synthetic fibre and a natural fibre? 1

Q2 How can we differentiate the synthetic fibre and the natural fibre based on 1
water absorption property?

Q3 What impact does the moth have on the synthetic fibre and the natural fibre? 1

Q4 Natural fibres form wrinkles when washed, what will happen in the case of the 1
synthetic fibre?

Concept – Plastics

Q1. What is plastic? 1

Q2 Give four examples of things that we commonly use made up of plastics. 1

Q3 What is polythene? 1

Q4 What is the full form of PVC? 1

Q5 Which material is used to make nonstick pans? 1

Q6 What do you understand by thermosetting plastics? 1

Q7 Give two examples of thermosetting plastics. 1

Q8 What do you understand by thermoplastics? 1

Q9 Give two examples of thermoplastics. 1

Q10 How the basic unit of plastics are arranged in both the types of plastics? 1

Concept – Useful properties of Plastics

Q1. Why do we prefer to use plastic containers instead of metal containers? 1

Q2 Why handles of cooking utensils are made up of plastic? 1

Q3 State one property of plastic that makes it very suitable to use. 1

Q4 Why the handles of screwdriver are made up of plastic? 1

Q5 Write some of the uses of plastics in the healthcare industry. 1

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