10% oleum comprises of 10% free_________________?

Related Mcqs:

1. 20% oleum means that in 100 kg oleum, there are 20 kg of_____________________?

   A. SO3 and 80kg of H2SO4
   B. H2SO4 and 80kg of SO3
   C. SO3 for each 100 kg of H2SO4
   D. None of these

2. Chemical formula of oleum is_________________?

   A. H2SO3
   B. H2SO4
   C. H2S2O7
   D. H2SO7

3. Oleum produces fumes of_____________________?

   A. SO2
   B. H2SO4
   C. SO3
   D. SO2 + H2SO4

4. Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at _____________ °C ?

   A. 15-30
   B. 90-100
   C. 250-300
   D. < 0

5. Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of_____________________?

   A. Nitric acid
   B. Hydrochloric acid
   C. Methyl alcohol
   D. Formic acid

6. More than 100 percent of _________________ is present in oleum?

   A. SO3
   B. H2SO4
   C. H2SO3
   D. SO2

7. Gun powder, which is an explosive comprises of charcoal, sulphur and____________________?

   A. Glycerine
   B. Salt petre
   C. Nitro glycerine
   D. Dynamite

8. A mineral is termed as ‘ore’, if ____________________?

   A. A metal can be economically extracted from it
   B. It contains ≥ 40% metal
   C. The metal present in it is costly
   D. All A , B. and C.

9. Hydrazine (N2H4) is used mainly as a/an__________________?

   A. Explosive
   B. Rocket fuel
   C. Detergents additive
   D. None of these

10. Deacon’s method is used for the manufacture of____________________?

    A. Glauber’s salt
    B. Common salt
    C. Chlorine
    D. Graphite electrode