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Which of the following samples will react fastest with dilute trioxonitrate (V) acid?

Chemistry
JAMB 1990
Which of the following samples will react fastest with dilute trioxonitrate (V) acid?
  • A. 5 g of lumps of CacO3 at 25°C
  • B. 5 g of powered CacO3 at 25°
  • C. 5 g of lumps of CaCO3 at 50°C
  • D. 5 g of powered CaCO3 AT 50°C
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Correct Answer: Option D
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