Heat 4K Cr O 4K CrO 3O X -> . In the above reaction X is

Potassium dichromate 2 2 7 K Cr O decomposes on heating to produce potassium chromate, chromic oxide, and oxygen. The reaction is as shown below, 2 2 2 7 4 2 Cr O 2(OH ) 2CrO H O -> D and F Block Elements 16 2 2 7 2 4 2 3 2 Heat 4K Cr O 4 K CrO + 2Cr O +3O Potassium Chromic chromate oxide -> Here, ‘X’ is a chromic oxide 2 3 Cr O . Thus, (c) is the correct option. 88. When dil. H2SO4 is added to aqueous solution of potassium chromate, yellow colour of solution turns to orange colour. It indicates (a) chromate ions are reduced (b) chromate ions are oxidised (c) mono centric com