Main use of hydrazine is

A. As a rocket fuel

B. In water treatment

C. As a disinfectant

D. As fire retardant

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  5. 20% oleum means that in 100 kg oleum, there are 20 kg of
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  20. Teflon is
  21. __________ is a thermosetting plastic.
  22. CaSO4 . ½H2O is known as
  23. Viscose rayon is
  24. Resistance to fusion of the refractory under a steady rising temperature condition is called
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  26. Synthesis gas is a mixture of
  27. __________ iron is the purest form of iron.
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