Question 212 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

Question 212 mL each of concentrated HCl,HNO3 and a mixture of concent

1.	Question 212 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
Answer» Question 21 2 mL each of concentrated $HCl, {HNO}_{3}$ and a mixture of concentrated $HCl$ and concentrated ${HNO}_{3}$ 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) $Pt$