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TRB MODEL QUESTIONS FOR CHEMISTRY

TRB Model Questions
21. Either chloroform and nitrous oxide are
 
  • A. Analgesics
  • B. Antibiotics
  • C. Anaesthetics
  • D. Explosives
Answer: C.
Anaesthetics
 
22. Calciferol is
 
  • A. Vitamin A
  • B. Vitamin B
  • C. Vitamin C
  • D. Vitamin D
Answer: D.
Vitamin D
 
 
23. Which of the following substances is used for preservation of food grains?
 
  • A. Vinegar
  • B. Sodium chloride
  • C. Sodium benzoate
  • D. Potassium permanganate
Answer: C.
Sodium benzoate
 
24. Which one of the following is a mixture?
 
  • A. Lime
  • B. Sugar
  • C. Sea water
  • D. Table salt
Answer: C.
Sea water
 
25. Non stick kitchen wares are coated with
 
  • A. Silicon
  • B. PVC
  • C. Graphite
  • D. Teflon
Answer: D.
Teflon