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Consider the following observations of a...

Consider the following observations of a compound br I. Decomposes on heating at 513 K to give green coloured and black coloured compounds. br I. Exhibits colour due to charge transfer. br II. Shows weak temperature dependent para magnetism. The compound is

A

`KMnO_4`

B

`K_2MnO_4`

C

`K_Cr_2O_7`

D

`K_2CrO_4`

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