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0. A white coloured compound 'XY' is used in photochromic lenses. Choose the incorrect statement from the following (NTSE Delhi, Stage-I, 2015-16)
The compound 'XY' decomposes into a metal and a non-metal on exposure to sunlight
The compound 'XY' is completely soluble in aq. ammonia solution
The metal part of 'XY' is grey coloured in elemental form
The non-metal part of 'XY' is violet coloured in elemental form
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