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The classic solid-state route to barium titanate calcines

  • A.barium hydroxide with titanium tetrachloride vapour
  • B.barium metal with titanium in an inert atmosphere
  • C.barium carbonate with titanium dioxide
  • D.barium nitrate solution with a titanium alkoxide

Answer: C

Mixed and milled carbonate and oxide are held near eleven hundred degrees, the carbonate decomposes and the oxides interdiffuse to the titanate. The other three describe wet chemical or vapour routes that make the same compound by quite different means.

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