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Pick out the wrong statement.

A. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction

B. Chloral is obtained by the chlorination of ethyl alcohol

C. Insecticides acting on the insects through the respiratory system are called fumigants

D. Benzene hexachloride is not a contact insecticide

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.
  2. Esterification reaction
  3. Which of the following paper does not require a filler during manufacture?
  4. Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action…
  5. Superior quality laboratory apparatus is made of the __________ glass having low thermal coefficient…
  6. Hydrazine is used in water treatment for the removal of
  7. Sugar content in sugarcane on cane basis is about __________ percent by weight.
  8. Portland cement consists mainly of
  9. Ordinary glass is not a/an
  10. Sulphur removal by heating of pyrite ore in presence of air is called its
  11. __________ process is used for the commercial production of nitric acid by the catalytic oxidation of…
  12. Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?
  13. Proximate analysis of coal determines its __________ content.
  14. Zeolite is a/an
  15. Chloramines are used in water treatment for
  16. Fermentator temperature during production of alcohol from molasses is around __________ °C.
  17. Glauber's salt is chemically represented by
  18. Sudden temperature fluctuation does not affect pyrex glass, because of its
  19. Ethanol amine is produced using ammonia and
  20. Which of the following is not produced on commercial scale from sea water?
  21. Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
  22. Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt…
  23. 10% oleum comprises of 10% free
  24. In the production of soda ash by Solvay process, the by-product is
  25. Dacron is a/an
  26. In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 2SO3), the reverse reaction becomes appreciable…
  27. Frasch process is for
  28. Low temperature carbonisation of coal takes place at __________ °C.
  29. __________ Nature of hypo (sodium thiosulphate) makes it useful in photography.
  30. Ore concentration by froth floatation utilises the __________ of ore particles.