refining
cracking
reforming
blending
Correct answer is C
No explanation has been provided for this answer.
lightness
low density
high density
high compressibility
Correct answer is D
EPS is known as one of the world’s 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.
C2H6
C3H8
C3H4
C6H6
Correct answer is D
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
CH3COOC2H5(1) + H2O(1) ⇌ CH 3COOH (aq) + C 2H 5OH (aq)
The purpose of H+ in the reaction above is to
increase the yield of products
maintain the solution at a constant PH
increase the rate of the hydrolysis
decrease the rate of the reverse reaction
Correct answer is C
The purpose of hydrogen ion is to speed up the decomposition of ethyl ethanoate to yield ethanoic acid and ethanol...so we can say that it is serving as a calalyst i.e increases the rate of hydrolysis.
The polymer used in making car rear lights is
perspex
bakeelite
polystyrene
polyacrylonitrile
Correct answer is A
No explanation has been provided for this answer.