1. Tardigrade
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  3. Chemistry
  4. Cr 2 O 72- is not a self indicator but

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Q. $Cr _{2} O _{7}^{2-}$ is not a self indicator but

Redox Reactions

Solution:

$Cr _{2} O _{7}^{2-}$ is not a self indicator, but it oxidises the indicator and act as oxidising agent.