JEE Main 20206 SeptemberMorning Shift
- Exam
- JEE Main
- Year
- 2020
- Date
- 6 September
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Polymers
JEE Main 2020 · 6 September · Morning Shift · Chemistry · Polymers
Consider the Assertion and Reason given below. Assertion (A) :...
Consider the Assertion and Reason given below.
Assertion (A) : Ethene polymerized in the presence of Ziegler Natta Catalyst at high temperature and pressure is used to make buckets and dustbins.
Reason (R) : High density polymers are closely packed and are chemically inert. Choose the correct answer from the following:
Options
- A(A) is correct but (R) is wrong.
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A).
- CBoth (A) and (R) are correct and (R) is the correct explanation of (A).
- D(A) and (R) both are wrong.
Correct answer
C. Both (A) and (R) are correct and (R) is the correct explanation of (A).
Step-by-step solution
High density polythene: It is formed when addition polymerisation of ethene takes place in a hydrocarbon solvent in the presence of a catalyst such as triethylaluminium and titanium tetrachloride (Ziegler-Natta catalyst) at a temperature of 333 K to 343 K and under a pressure of 6-7 atmospheres. High density polythene (HDP) thus produced, consists of linear molecules and has a high density due to close packing. It is also chemically inert and more tougher and harder. It is used for manufacturing buckets, dustbins, bottles, pipes, etc.