Which of the following is true for heavy water?

  • A
    It is formed by the combination of the heavy isotope of hydrogen and oxygen.
  • B
    Water having maximum density at $4 \ ^\circ C$ is called heavy water.
  • C
    It is lighter than $H_2O$.
  • D
    None of these.

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$CO_{(g)} + H_2O_{(g)} \xrightarrow{T_2} CO_{2(g)} + H_{2(g)}$
The temperatures $T_1$ and $T_2$ are correctly related as:

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Which of the following processes produces hydrogen with the highest purity $(99.9\%)$?

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