Chemical formula of oleum is_________________?

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. Oleum produces fumes of_____________________?

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

3. 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

4. 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

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

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

6. 10% oleum comprises of 10% free_________________?

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

7. Chemical formula of BHC, which is an insecticide is__________________?

   A. C6H6Cl6
   B. C6Cl6
   C. C6H5Cl
   D. C6H4Cl2

8. Chemical formula of ‘salt cake’ is____________________?

   A. Na2SO4
   B. CaSO4
   C. MgSO4
   D. BaSO4

9. CaCl(OCl) is the chemical formula of___________________?

   A. Hypo
   B. Bleaching powder
   C. Plaster of Paris
   D. Aqua regia

10. Superior quality laboratory apparatus is made of the _____________ glass having low thermal co-efficient of expansion & high chemical resistance?

    A. Flint
    B. Soda
    C. Pyrex
    D. Potash