Select an option with a set of two noble metals.

Gold (Au); Sodium (Na)

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Gold (Au); Platinum (Pt)

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Silver (Ag); Potassium (K)

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Gold (Au); Iron (Fe)

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Solution

The correct option is B Gold (Au); Platinum (Pt)
Gold (Au) and Platinum (Pt) are noble metals and are inert towards $H C l, H N O_{3}, H_{2} S O_{4}$ and do not react with these acids. However, Platinum, gold and mercury can be dissolved in aqua regia, a highly concentrated mixture of hydrochloric acid and nitric acid.

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Similar questions

A noble metal is one which is inert and does not react with acids like $H C l, H N O_{3}, H_{2} S O_{4}$ . Select an option with a set of two noble metals.

Q. Aqua regia is used to dissolve noble metals such as Pt(Platinum) and Au(Gold).

Q. Choose the correct option(s) for electroplating of gold

(A u)

onto a silver

(A g)

medal.

Observe the table and identify metals and nonmetals. Select the correct option.
$\begin{matrix} Sl.No & Set-1 & Set-2 1. & Sodium(Na) & Oxygen(O) 2. & Magnesium(Mg) & Chlorine(Cl) 3. & Iron(Fe) & Helium(He) 4. & Gold(Au) & Sulphur(S) 5. & Calcium(Ca) & Carbon(C) \end{matrix}$

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