Unknown metal Appearance Reactions with dilute HCl Reaction with dilute HNO $_{3}$
(1) Dull gray solid with white oxide coating Dissolved with bubbles of clear gas Dissolved with bubbles of clear gas
(2) Solid; lustrous smooth silver-gray surface No reaction Dissolved with bubbles of orange gas
Which of the following represents unknown metal (2) ?

Carbon

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Copper

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Zinc

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Sodium

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Silver

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Solution

The correct option is E Silver
Unknown metal (2) could be silver. It is a relatively inert metal.
Note: Carbon is not a metal. Copper is brownish, zinc is reactive metal with whitish oxide coat in air. Sodium is highly reactive and explodes when it comes in contact with water. It reacts with acids even violently.

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Similar questions

Unknown metal	Appearance	Reactions with dilute HCl	Reaction with dilute HNO $_{3}$
(1)	Dull gray solid with white oxide coating	Dissolved with bubbles of clear gas	Dissolved with bubbles of clear gas
(2)	Solid; lustrous smooth silver-gray surface	No reaction	Dissolved with bubbles of orange gas

_{3}

Unknown metal	Appearance	Reactions with dilute HCl	Reaction with dilute HNO $_{3}$
(1)	Dull gray solid with white oxide coating	Dissolved with bubbles of clear gas	Dissolved with bubbles of clear gas
(2)	Solid; lustrous smooth silver-gray surface	No reaction	Dissolved with bubbles of orange gas

	Appearance	Reactions with dilute $H C l$	Reaction with dilute $H N O_{3}$
Unknown metal #1	Dull gray solid with white oxide coating	Dissolved with bubbles of clear gas	Dissolved with bubbles of clear gas
Unknown metal #2	Solid; lustrous, smooth silver-gray surface	No Reaction	Dissolved with bubbles of orange gas

H N O_{3}

2

	Appearance	Reaction with dilute $H C l$	Reaction with dilute $H N O_{3}$
Unknown metal #1	Dull gray solid with white oxide coating	Dissolved with bubbles of clear gas	Dissolved with bubbles of clear gas
Unknown metal #2	Solid; lustrous, smooth silver-gray surface	No reaction	Dissolved with bubbles of orange gas

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