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TNPSC Chemistry Quiz Questions and Answers

9. Ruby is an oxide of
 
  • A. Silver
  • B. Aluminium
  • C. Platinum
  • D. Gold
Answer: B.
Aluminium
 
10. Which of the following alloys is used for making magnets?
 
  • A. Duralumin
  • B. Alnico
  • C. Stainless Steel
  • D. Magnalium
Answer: B.
Alnico
 
 
11. Which one of the following compounds gives iodoform reaction?
 
  • A. Acetone
  • B. Benzo phenone
  • C. Benzaldehyde
  • D. Methyl alcohol
Answer: A.
Acetone
 
12. The mass number of hydrogen is
 
  • A. 1
  • B. 3
  • C. 3.5
  • D. 2.8o
Answer: A.
1