Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like_________________?

Related Mcqs:

1. Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively ?

   A. V2O5 & Cr2O3.
   B. Oxides of nitrogen & Cr2O3
   C. V2O5 on a porous carrier & oxides of nitrogen
   D. Oxides of nitrogen & V2O5 on a porous carrier

2. Contact process of sulphuric acid manufacture ____________________?

   A. Yields acid of higher concentration than chamber process
   B. Yields acids of lower concentration than chamber process
   C. Is obsolete
   D. Eliminates absorber

3. In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst___________________?

   A. Gives higher conversion efficiency
   B. Has a longer life and is not poisoned by arsenic
   C. Handles lower SO2 content gas (7 -10% SO2), thus increasing the capital cost of the plant
   D. All A , B. and C.

4. In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed ?

   A. Furnace → converter → absorber
   B. Furnace → evaporator → absorber
   C. Furnace → converter → evaporator
   D. Converter → furnace → absorber

5. During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as_______________________?

   A. It is very corrosive at elevated temperature
   B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be
   further reduced)
   C. It decomposes on further increasing the temperature
   D. None of these

6. Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of ____________________?

   A. Nitric acid
   B. Sulphuric acid
   C. Ammonium sulphate
   D. Hydrochloric acid

7. Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of_________________?

   A. Carbon
   B. Arsenic
   C. Lead
   D. Sulphur

8. Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process ?

   A. NH3
   B. NaCl
   C. CaO
   D. Coke

9. Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the_______________?

   A. Fertiliser manufacture
   B. Car battery solution
   C. Synthesis of oleum
   D. Water treatment

10. Sulphuric acid is mainly used in the _______________ industry ?

    A. Fertiliser
    B. Steel
    C. Paper
    D. Paint