Polymers — Prelims Questions

Which of the following statements about thermoplastics and thermosetting plastics is/are correct? 1. Thermoplastics can be remolded repeatedly upon heating. 2. Thermosetting plastics are generally linear or branched polymers. 3. Bakelite is an example of a thermoplastic. Select the correct answer using the code given below:

Consider the following polymers: 1. Cellulose 2. Nylon-6,6 3. DNA 4. Polyethylene Which of the above are natural polymers?

Which of the following polymerization processes involves the elimination of small molecules like water?

Consider the following statements regarding biodegradable polymers: 1. They are designed to degrade into natural substances by microbial action. 2. Polylactic Acid (PLA) is a common example of a biodegradable polymer. 3. All bioplastics are necessarily biodegradable. Which of the statements given above is/are correct?

With reference to the Plastic Waste Management Rules in India, consider the following statements: 1. The rules introduce the concept of Extended Producer Responsibility (EPR). 2. They mandate a complete ban on all types of plastic carry bags. 3. The rules aim to promote a circular economy for plastics. Which of the statements given above is/are correct?