Chemistry 2014 | Study Mode

Question 41
A
perspex
B
bakeelite
C
polystyrene
D
polyacrylonitrile
Explanation

Question 42
A
increase the yield of products
B
maintain the solution at a constant PH
C
increase the rate of the hydrolysis
D
decrease the rate of the reverse reaction

Question 43
A
C2H6
B
C3H8
C
C3H4
D
C6H6
Explanation
molecular mass = 2 x vapour density
= 2 x 39 = 79
Cn Hn = 78
12n + 1n = 78
13n = 78
n = $$\frac{78}{13}$$ = 6
Cn Hn = C 6H 6

Question 44
A
ligjtness
B
low density
C
high density
D
high compressibility
Explanation
EPS is known as one of the worlds most effective and lightweight insulation and packaging materials. It has low thermal conductivity and is moisture resistant, so it is often used as insulation against changing temperatures. Its high compressive strength gives it excellent shock absorption properties, making it an efficient packaging material.

Question 45
A
refining
B
craching
C
reforming
D
blending

Question 46
A
diesel oil
B
gasoline
C
kerosene
D
lubricating oil
Explanation

Question 47
A
2-bromo-3-chlorobutanol
B
3-bromo-2-chlorobutanol
C
3-chloro-2-bromobutanol
D
2-chloro-3-bromobutanol

Question 48
A
purify the gas
B
dry the gas
C
liquefty the gas
D
remove odour

Question 49
A
O2
B
SO2
C
HCI.
D
H2
Explanation

Question 50
A
heat of reaction
B
activation energy
C
free energy
D
entropy of reaction