Engineering Sciences
GATE XE topic:chemistry-high-polymers PYQs
Build your understanding with focused practice from past exam papers.
Questions 61–66 of 66. Imported answers require independent review unless marked reviewed.
Question 22
Open questionXE-FNAT2 marksNeeds review
The heat of polymerization of styrene is 20 Kcal/mol. Heat of 5 x 10
Kcal will be released on polymerization of _________ Kg of styrene (C = 12 and H = 1 g/mol).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 101
Open questionXE-FMCQ1 markNeeds review
Poly(vinyl chloride) has a higher T_g than polypropylene due to the presence of
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 103
Open questionXE-FMCQ1 markNeeds review
Which one of the following catalysts is used to prepare ‘isotactic’ polypropylene?
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 105
Open questionXE-FMCQ1 markNeeds review
Which of the following reagents can act as an initiator at room temperature?
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 111
Open questionXE-FNAT2 marksNeeds review
The density of polyethylene crystals is 998 kg/m³ and that of totally amorphous polyethylene is 886 kg/m³. If the density of a polyethylene sample is 949 kg/m³, the crystallinity in volume fraction is ____ % (round off final answer to two digits after decimal place).
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 117
Open questionXE-FNAT2 marksNeeds review
For the polycondensation of equimolar amounts of adipic acid with hexamethylene diamine, if the number average degree of polymerization is 100, then the extent of reaction is ______ %.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer