DDT should not be allowed to come in contact with iron (during its manufacture) to _______________?

Related Mcqs:

1. The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is _________________?

   A. Dilute H2SO4 B. Oleum C. Ultraviolet light D. None of these...

2. Co-efficient of thermal expansion of glass is decreased by the addition of _______________ during its manufacture?

   A. CaO B. MnO2 C. ZnO D. FeS...

3. Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________?

   A. Hematite B. Magnetite C. Siderite D. Chalcopyrite...

4. Which is the main reducing agent during production of iron from iron ore in a blast furnace ?

   A. C B. CO C. CO2 D. H2...

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acid of higher concentration than chamber process B. Yields acids of lower concentration than chamber process C. Is obsolete D. Eliminates absorber...

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

   A. High cost B. Fragile nature C. Easy poisoning tendency D. All A, B. and C....

8. 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...

9. ___________________ iron is the purest form of iron?

   A. Cast B. Wrought C. Pig D. High silicon...

10. ______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace?

    A. Bauxite B. Limestone C. Quartz D. Manganese...