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0. In which of the following solutions will platinum dissovle? (NTSE Tamil Nadu, Stage-I, 2015-16)
Conc HN03 and Conc HCI in the ratio 3 : 1
Conc H2S04 and Conc HN03 in the ratio 3:4
Conc HCI and Conc H2S04 in the ratio 1 : 3
Conc HCI and Conc HN03 in the ratio 3 : 1
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