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Question
Choose the correct answer from the options given below :
Which one is colourless anion?
Options
\[\ce{HCO^-_3}\]
\[\ce{Cr 20^2-_7}\]
\[\ce{Cr O^2-_7}\]
\[\ce{Mn O^-_4}\]
Solution
\[\ce{HCO^-_3}\] is colourless anion.
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