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WorksheetsTEST Online SID2008
Total questions: 20
Worksheet time: 21mins
Which is the best halogenating agents?
chlorine
bromine
fluorine
iodine
Which statement below is not correct for hydrogen chloride
Hydrogen chloride is gas at room temperature
Hydrogen chloride is main product in chlorination reaction
Solutions of hydrogen chloride in water are known as hydrochloric acid
Hydrogen chloride is co-product of reactions involving chlorine.
All hydrocarbon below can be feedstock to produce PVC (polyvinylchloride) EXCEPT
acetylene
ethylene
ethane
toluene
Production of vinyl chloride from acetylene will produce higher yield. Why we change the manufacturer process by using ethylene as reactant?
TWO major problem with direct chlorination using ethylene are:
poor selectivity to vinyl chloride
ethylene is expensive
Catalyst cannot be recycled
HCl by-product no commercial value
Justify your answer in choosing oxidizing agent (air or oxygen) in oxychlorination reaction.
The treatment of acid gas streams in chlorination is more complex because any equipment in contact with acid gases and water must be constructed from:
acid-resistant materials
internally coated material to prevent corrosion
cheaper material
coated with catalyst to increase reaction rate
Which one of the following is the electrophile in the reaction shown below?
Benzene
NO3¯
NO2 +
H2SO4
What is preferential attack on naphthalene structure?
1
2
3
4
Which of the TWO following groups are ortho/para directors?
NO2
-OCH3
-CO2CH3
-CH3
Which isomer of dichlorobenzene gives a single mononitration product?
Ortho
Meta
Para
Arrange the following compounds in order of increasing reaction rate with HNO3/H2SO4.
I < II < III
II < III < I
III < II < I
Which one of the following substituents is deactivating and ortho-para directing in electrophilic aromatic substitution reactions?
-Cl
-N(CH3)2
-CO2H
CH3
Which statement most accurately describes why a higher pressure is not used in industry for the catalytic hydration of ethylene
a) Produces a lower % yield.
b) Expensive and dangerous
c) Structural integrity of any reaction vessel would be compromised
d) The rate of reaction would be too fast
Ethylene + water −> ethanol is exothermic . What will happen if we increase the temperature
The reaction will slow down
There will be no change in ethanol production
More ethanol will be produced
Less ethanol will be produced
How to overcome reversible reaction in esterification?
What is the function of acidic catalyst in esterification?
The most common method of esterification is the reaction of a concentrated
alcohol and a concentrated carboxylic acid with the elimination of water
Right
Wrong
Choose TWO correct advantages by using esterification reaction
Most esters possess low toxicity because
they are easily hydrolyzed on contact with water or moist air
Strong mineral acid catalyst will reduce pollution
Gain profit by by-product produce from esterication reaction
The generation of aqueous effluents is not extensive since water is the only by-product of the esterification reaction
