TEST2
Click on the correct answer
1
1st statement : There are no double bonds in perspex.
2nd statement: Perspex is an addition polymer.
Both statements are true but the 2nd one is not a correct explanation of the 1st one.
Only one statement is true while the other is false.
Both statements are true and the 2nd one is a correct explanation of the 1st one.
Both statements are false.
2
1st statement : All the condensation polymers are thermosetting plastics.
2nd statement: Cross-links are present in all condensation polymers.
Both statements are true but the 2nd one is not a correct explanation of the 1st one.
Only one statement is true while the other is false.
Both statements are true and the 2nd one is a correct explanation of the 1st one.
Both statements are false.
3
Which of the following compounds is the first member of the alkene series?
But-1-ene
Ethene
Pent-1-ene
Propene
4
Which of the following statements concerning the compound C
2
H
4
and C
3
H
6
is correct?
They belong to different homologous series
They have the same boiling point
They are unsaturated hydrocarbons
They are liquids at room conditions
5
Which of the following polymers has the same linkage as protein?
polyester
nylon
urea-methanal
PVC
6
Strong heating a sample of polymer with soda lime liberates a gas which is alkaline to litmus. That polymer may be
polyester
nylon
urea-methanal
PVC
7
Which of the following about condensation polymers is not correct?
Monomers for condensation polymer must have two function groups.
When a condensation polymer is formed, a small molecule is eliminated between each pair of monomers.
They are thermosetting plastics.
Cellulose and protein are usually condensation polymers.
8
Which of the following properties about PE is incorrect?
It is a good insulator of heat.
It does not react with water.
It decolorises Br
2
readily.
It is flammable.
9
If a sample of polymer is heated in a test tube and fumes evolved are acidic to litmus, the polymer may be
polyester
PE
PP
PVC
10
Which of the following is / are the raw materials in the making of polymer?
1. coal
2. petroleum
3. natural gas
1 only
2 only
1 and 2
2 and 3
11
Under suitable condition, chloroethene may be polymerized to poly(chloroethene) with a 99% yield. Calculate mass of chloroethene required to making 30 kg of poly(chloroethene)?
30.3 kg
32.6 kg
33.9 kg
36.9 kg
12
The most important use of PTFE is in the making of
plastic bags
rubber tyres
non-stick cooking surface
plastic bottles
13
Which of the following is / are condensation polymer(s)?
1. perspex
2. terylene
3. nylon
1 only
1 and 2
2 and 3
1 and 3
14
Which of the following is a synthetic condensation polymer?
Cellulose
PVC
PP
Urea- methanal
15
Which of the following methods can be used to solve the pollution problems associated with the disposal of plastic waste ?
1. recycling of plastics
2. making biodegradable plastics
3. burning plastic waste in incinerators with tall chimneys
(1) and (2) only
(1) and (3) only
(2) and (3) only
(1), (2) and (3)