Q21Multiple choice
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
- (a)Al
- (b)Au
- (c)Cu
- (d)Pt METALS AND NON-METALS 21
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(b) Au