1.Cathode used in electro chemical manufacture of adiponitrile from acrylonitrile is ____________
a) Titanium
b) Platinum-coated carbon
c) Graphite
d) Lead
Explanation: The electrochemical cell uses platinum-coated carbon or titanium as anode and lead as cathode. Anode and cathode are separated by permeable membrane.
2. Anolyte used in electro chemical manufacture of adiponitrile from acrylonitrile is ______________
a) Lead
b) Sulfuric acid
c) Titanium
d) Ammonium salt solution
Explanation: Lead is used as cathode; Titanium is used as anode, quaternary ammonium salt solution as catholyte, and sulfuric acid as anolyte. For anolyte and catholyte, separate fluid circulating systems are maintained.
3. Which of the following raw material is not used in production of tetra ethyl lead (TEL) by electro chemical process?
a) Lead metal
b) Magnesium chloride
c) Ethyl chloride
d) Ethyl magnesium chloride
Explanation: Reaction 2C2H5 MgCl+2C2H5 Cl+Pb →Pb(C2H5)4 + 2MgCl2 is involved in the production of tetra ethyl lead. Hence the raw materials required are lead metal, ethyl chloride, and ethyl magnesium chloride.
4. Which of the following acts as cathode in production of tetra ethyl lead (TEL) by electro chemical process?
a) Lead
b) Titanium
c) Stainless steel
d) Paltinum
Explanation: Electrolytic cells in production of tetra ethyl lead (TEL) uses lead as anode and stainless steel as cathode where the electrolyte has Grignard reagent along with suitable solvents.
5. Grignard reagent is used in production of tetra ethyl lead (TEL) by electro chemical process.
a) False
b) True
Explanation: Ethyl magnesium chloride (C2H5 MgCl) is used in the production of tetra ethyl lead (TEL) by electro chemical process which means Grignard reagent is used.
6.Shorting of cell in production of tetra ethyl lead (TEL) is prevented by adding __________
a) Excess Grignard reagent
b) Excess C2H5Cl
c) Excess Mg
d) Excess MgCl2
Explanation: Eliminated magnesium metal is deposited at cathode bridging the gap between electrodes which leads to shorting of cell. Hence excess C2H5Cl is added as reacts with magnesium forming Grignard reagent.
7. Which of the following acts as thermal stabilizer for tetra ethyl lead?
a) Diethyl ether
b) Tetra hydro furan
c) Aromatic hydrocarbon
d) Ethyl magnesium chloride
Explanation: Tetra hydro furan and diethyl ether are used to increase conductivity, ethyl magnesium chloride (Grignard reagent) is a raw material for production of tetra ethyl lead, and aromatic hydrocarbon is used as thermal stabilizer for TEL.
8. Which one mentioned below is not a major industrial chemical produced by chloro-alkali industry?
a) Soda ash
b) Caustic soda
c) Chlorine
d) Ammonium carbonate
Explanation: The chloro alkali industry represents production of three major industrial chemicals:
Soda ash(sodium carbonate), caustic soda(sodium hydroxide), chlorine(Cl2). Thus ammonium carbonate is not a chloro-alkali product.
9. Which one is dual process?
a) Na2CO3+NH4Cl
b) Na2CO3+NaCl
c) NH4Cl+Ca(OH)2
d) CaCO3+NaCl
Explanation: Ammonium chloride and calcium hydroxides reacts in solvay process along with calcium carbonate and sodium chloride while sodium carbonate and ammonium chloride reacts in dual process.
10. What is the input bulk requirements for the solvay process?
a) Salt, coal and water
b) Salt, coal and limestone
c) Salt, limestone and water
d) Coal, limestone and water
Explanation: Input bulk requirements for the solvay process are salt, coal and limestone Salt is used as brine pumped from deep walls or as crystalline sat via evaporation procedures.