Unit Processes Multiple Choice Questions on “Amination Reactions”.
1. Which metal catalyst is used in amination of aromatic halogen compound?
a) Cu
b) Ar
c) Ag
d) All of the mentioned
Answer: d
Clarification: In reaction of amination of aromatic halogens, some metals or compounds of metals following hydrogen in the electromotive series are advantageously used as catalysts (e.g., copper, arsenic, and silver) and Copper, copper oxides, and copper salts are most widely used.
2. In manufacturing of Aniline from Chlorobenzene which salt gives better result?
a) Cuprous salt
b) Aluminium salt
c) Zinc salt
d) All of the mentioned
Answer: a
Clarification: In the manufacture of aniline from chloro benzene, cuprous salts give better results and air is kept from the system to prevent the formation of cupric ions.
3. In the preparation of easily oxidizable amines, ____ catalyst is good.
a) High
b) Low
c) Moderate
d) None of the mentioned
Answer: b
Clarification: in the preparation of easily oxidizable amines, low catalyst concentration results in a smaller difference in reaction rates when cuprous and cupric compounds.
4. The reaction of aniline with cupric nitrate leads to what of the amine?
a) Reduction
b) Acidification
c) Oxidation
d) Hydrogenation
Answer: c
Clarification: The treatment of aniline with cupric nitrate leads to oxidation of the amine.
5. The catalyst of Aluminium phosphate acts as what?
a) Hydrating
b) Dehydrating
c) Aminating
d) All of the mentioned
Answer: b
Clarification: A dehydration catalyst has been made by incorporating aluminium phosphate in alumina gel prior to dehydrating the gel.
6. Which of the following is a Foraminate catalyst?
a) Ni
b) H2
c) Al
d) All of the mentioned
Answer: a
Clarification: Nickel, cobalt and copper are foraminate catalyst.
7. Metal catalyst shouldn’t be used in exothermic reactions.
a) True
b) False
Answer: b
Clarification: As they are metals they are very good heat conductors, a property which sometimes can make them exceptionally suitable for use in strongly exothermic reactions.
8. Al can be extracted from the product by which media?
a) Acid medium
b) Alkaline medium
c) None of the mentioned
d) Both of the mentioned
Answer: b
Clarification: Aluminium is usually employed as the extractable component, which can be dissolved out of the alloy by the action of alkaline media such as caustic soda solution.
9. Complete the following reaction: 2NaAlO2 + H2O —–> ______ + H2O.
a) AlO3
b) Al2O4
c) Al2O3
d) NaAlO2
Answer: c
Clarification: The following reaction is: 2NaAlO2 + H2O —–> Al2O3 + H2O.
10. Secondary alcohols give less amines than primary.
a) True
b) False
Answer: b
Clarification: Under comparable conditions, secondary alcohols give more monoamine than primary alcohols.
11. Which of the following is foraminate characteristics?
a) High yield
b) High space velocity
c) Low cost
d) All of the mentioned
Answer: d
Clarification: The advantages of foraminate are: (1) high conversions and yields are obtainable, (2) relatively high space velocities can be employed, (3) the ratio of product amines can be varied over a wide range, and (4) the cost of the catalyst is comparatively low.