Synthetic polymers
1. This question has 3 part(s).
1.1. This question is about alkenes and polymers.
Ethene (C2H4) can be represented by different types of formula.
i) Complete the table by giving the missing information.
(2)
Molecular formula | C2H4 |
Empirical formula | |
General formula |
ii) Ethene is a member of the homologous series of alkenes. All members of the same homologous series have the same general formula. Give two other characteristics of a homologous series.
(2)
1. ............................................................................
2. ............................................................................
1.2. Ethene is used to make poly(ethene).
i) State the type of polymerisation used to form poly(ethene).
(1)
ii) Complete the equation for the polymerisation of ethene.
(2)
iii) Poly(ethene) is used to make plastic bags. Corn starch from plants can also be used to make polymers for plastic bags. The table gives some information about poly(ethene) and polymers made from corn starch.
Polymers | Polymers from corn starch | |
|---|---|---|
Cost per tonne | £1500 | £3700 |
Relative strength | 100 | 50 |
Time to decompose | estimated 450 years | 3-6 months |
Use the information in the table and your knowledge to discuss the advantages and disadvantages of using poly(ethene) to make plastic bags.
(5)
1.3. The diagram shows the repeat unit of another polymer.
Draw the displayed formula of the monomer used to make this polymer.
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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