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General Science Gk Questions

General Knowledge
25. Potassium permanganate is used for purifying drinking water, because
 
  • A. It is a sterilising agent
  • B. It dissolves the impurities of water
  • C. It is a reducing agent
  • D. It is an oxidising agent
Answer: D.
It is an oxidising agent
 
26. Life of RBC in human blood is of
 
  • A. 30 days
  • B. 60 days
  • C. 15 hours
  • D. 120 days
Answer: D.
120 days
 
 
27. Monazite is an ore of
 
  • A. Titanium
  • B. Thorium
  • C. Iron
  • D. Zirconium
Answer: B.
Thorium
 
28. Tetraethyl lead is used as
 
  • A. Pain killer
  • B. Mosquito repellent
  • C. Petrol additive
  • D. Fire extinguisher
Answer: C.
Petrol additive