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

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. 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

3. Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an?

   A. Explosive
   B. Soap
   C. Detergent
   D. Analgesic drug

4. Oleum produces fumes of_____________________?

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

5. 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at _____________ °C ?

   A. < 0
   B. 10-30
   C. 250-280
   D. 500-600

6. Chloral is used in the manufacture of__________________?

   A. DDT
   B. BHC
   C. Parathion
   D. None of these

7. Pick out the exothermic reaction out of the following ?

   A. C + H2O = CO + H2
   B. CaC2 + H2O = Ca(OH)2 + C2H2
   C. MgCO3 = MgO + CO2
   D. All (A), B. and (C)

8. Chemical formula of oleum is_________________?

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

9. 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

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

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