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TRB MODEL QUESTIONS FOR CHEMISTRY

TRB Model Questions
1. Nitric acid is manufactured by
 
  • A. Ostwalt process
  • B. Retorts process
  • C. Contact process
  • D. Haber's process
Answer: A.
Ostwalt process
 
2. The drugs, caffeine, tannins and nicotine are
 
  • A. Cortisones
  • B. Alkaloids
  • C. Steroids
  • D. Milk alkalis
Answer: B.
Alkaloids
 
 
3. The chemical used as a 'fixer' in photography is
 
  • A. Ammonium persulphate
  • B. Boraux
  • C. Sodium thiosulphate
  • D. Sodium sulphate
Answer: C.
Sodium thiosulphate
 
4. Which one of the following has the highest fuel value?
 
  • A. Hydrogen
  • B. Charcoal
  • C. Gasoline
  • D. Natural gas
Answer: A.
Hydrogen
 
5. Metal ore, galena contains
 
  • A. Silver
  • B. Lead
  • C. Zinc
  • D. Magnesium
Answer: B.
Lead