Check sibling questions

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

 

Answer

3:1 solution of HCl and HNO 3 is called Aqua regia and it is able to dissolve gold.

 

So, the correct option is (b) Au

Are ads bothering you?

CA Maninder Singh's photo - Expert in Practical Accounts, Taxation and Efiling

Made by

CA Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo