Select an option with a set of two noble metals- Gold -Au- Platinum -Pt-Silver -Ag- Potassium -K-Gold -Au- Iron -Fe-Gold -Au- Sodium -Na-

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Metals Reaction with Acid

Select an opt...

Question

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

Assertion: Compounds of active metals (Zn, Na, Mg) are reducible by

H_{2}

Reason: Compounds of noble metals (Cu, Ag, Au) are not reducible by

H_{2}

State True or False.

Compounds of active metals (Zn, Na, Mg) are reducible by H

_{2}

, whereas those of noble metals (Cu, Ag, Au) are not reducible.

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).

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