250+ TOP MCQs on Environments – Organic Acids and Answers

Corrosion Engineering Multiple Choice Questions on “Environments – Organic Acids”.

So i want something with a decent camera and the ability to play high quality games. The cinchona root contains tannins and other https://criticalfutureglobal.com/company-overview Malabanban Norte substances that can be extracted from the leaves, and which can give the liquid a reddish-brown appearance, depending on. Both mifepristone and misoprostol kits are manufactured in south africa by the gilead group of companies.

They may be taken orally or they may be placed under the tongue. These tablets come in many varieties, purchase ivermectin online Baykal’sk which will help you choose the best for your needs. In some cases it is known for the side effects to cause, but not as severe as other medications.

1. Which of the following materials is/are used for handling acetic acid?
a) Type 316 and 304 Stainless steels
b) Copper and Bronzes
c) Duriron and Hastelloy C
d) Hastelloy C, Durimet 20, Duriron, Copper, Bronzes and 316 and 304 stainless steels
Answer: d
Clarification: Acetic acid is the most important organic acid from the standpoint of quantity produced. Hastelloy C, Durimet 20, Duriron, Copper, Bronzes, and 316 and 304 stainless steels are widely used for handling acetic acid.

2. Which of the following metals will switch positions in acetic acid as the temperature gets increased?
a) Copper and stainless steel
b) Stainless steel and nickel
c) Steel and copper
d) Aluminum and nickel
Answer: a
Clarification: Acetic acid exhibits unusual corrosion behavior with an increase in temperature. Copper and stainless-steel switch positions as the temperature are increased. Copper shows little corrosion at high temperatures whereas stainless steels corrode rapidly and vice versa.

3. Organic acids are relatively weaker than the inorganic acids because they are slightly ionized.
a) True
b) False
Answer: a
Clarification: Organic acids are relatively weaker than the inorganic acids because they are slightly ionized. The relatively high degree of ionization of inorganic acid results in greater electrochemical corrosion of metal.

4. Which of the following is the most corrosive organic acid?
a) Acetic acid
b) Formic acid
c) Ethanol
d) Acetone
Answer: b
Clarification: Formic acid is one of the strongest and most corrosive organic acids. It mainly results in stress-corrosion cracking of various metals at various conditions. The chemical formula of formic acid is HCOOH.

5. Which of the following metal is prone to stress corrosion cracking in methanol?
a) Nickel
b) Copper
c) Titanium
d) Stainless steel
Answer: c
Clarification: Methanol is the derivate of methane and it is also called methyl alcohol. The chemical of methanol is CH₃OH. Titanium is prone to stress corrosion cracking in methanol with the presence of chloride impurities.

6. Which of the following metals will have high corrosion rates in aerated acetic acid?
a) Aluminum and its alloys
b) Copper and its alloys
c) Titanium and its alloys
d) Nickel and its alloys
Answer: b
Clarification: Copper and its alloys will be highly affected by aeration (oxygen) in acetic acid and it increases with an increase in temperature. It can be prevented by deaeration and decrease in temperature.

7. Which of the following impurities that affect the corrosion rate of carbon steel in benzene solvent?
a) Oxygen
b) Butyric acid
c) Oxygen and butyric acid
d) Zinc dust
Answer: c
Clarification: Oxygen and butyric acid are the impurities that affect the corrosion rate of carbon steel in benzene solvent. It can be prevented by eliminating oxygen.

8. What are the parameters that affect the corrosion rate of metal in organic acids?
a) Solvent composition
b) The solubility of corrosion products
c) Oxygen solubility
d) Solvent composition, the solubility of corrosion products and oxygen solubility
Answer: d
Clarification: Parameters that affect the corrosion rate of metals in organic acids are:
i. Solvent composition and structure
ii. The solubility of corrosion products
iii. Oxygen solubility.

9. Which of the following is/are the corrosion prevention methods in organic acids?
a) Selection of materials and drying
b) Selection of materials, drying, deaeration, and neutralization of the solvent
c) Deaeration and neutralization of the solvent
d) Drying and deaeration
Answer: b
Clarification: Corrosion prevention methods in organic acids:
i. Selection of materials
ii. Drying
iii. Deaeration
iv. Neutralization of the solvent.

10. The application of electrochemical protection methods in organic acids is restricted due to low electrical conductivity.
a) True
b) False
Answer: a
Clarification: Application of electrochemical protection methods in organic acids is restricted due to low electrical conductivity. As we know cathodic and anodic protection is based on electrical conductivities of metallic structure and medium.