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TRB MODEL QUESTIONS FOR CHEMISTRY

TRB Model Questions
16. pH of water is
 
  • A. 0
  • B. 4
  • C. 7
  • D. 12
Answer: C.
7
 
17. Hypo used in photography is
 
  • A. Silver bromide
  • B. Silver nitrate
  • C. Sodium thio sulphate
  • D. Sodium chloride
Answer: C.
Sodium thio sulphate
 
 
18. Which one of the following iron alloys cracks easily?
 
  • A. Mild steel
  • B. Cast iron
  • C. Stainless steel
  • D. Wrought iron
Answer: D.
Wrought iron
 
19. Which of the following hormones contains iodine?
 
  • A. Insulin
  • B. Thyroxine
  • C. Adrenaline
  • D. Testosterone
Answer: B.
Thyroxine
 
20. Which one of the following is an active component of oil of clove?
 
  • A. Eugenol
  • B. Menthol
  • C. Methanol
  • D. Benzaldehyde
Answer: A.
Eugenol