Machine-translated by Google. Questions are authored in English.
Top

Discussion

Match each synthesis route with its defining step.
List I
A. Sol-gel
B. Coprecipitation
C. Hydrothermal
D. Spray pyrolysis
List II
1. reaction in water above its normal boiling point
2. hydrolysis and condensation of an alkoxide
3. atomising a solution into a hot zone
4. adding a base to bring cations down together

  • A.A-3, B-1, C-4, D-2
  • B.A-2, B-4, C-1, D-3
  • C.A-4, B-2, C-1, D-3
  • D.A-2, B-4, C-3, D-1

Answer: B

Each route is named for the step that controls the product. Recognising that step tells you what the powder will look like: molecular mixing from sol-gel, one particle per droplet from spray pyrolysis, and well-formed crystals from hydrothermal growth.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.