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A metal gets coated with a green basic c...

A metal gets coated with a green basic carbonate when exposed to atmosphere. Metal is

A

Nickel

B

Chromium

C

Copper

D

Zinc

Text Solution

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The correct Answer is:
C
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Assertion : Copper metal is turned green when exposed to atmospheric CO_(2) and moisture. Reason: Copper gets covered with a green layer of basic copper carbonate.

When a grey coloured object made of metal A is left exposed to damp air for a considerable time, it gets covered with a red-brown flaky coating by the process called B which eats up the whole object gradually. It is said that the presence of C and D is necessary for this process to take place. If this object is galvanised by metal E, then the process B does not occur. Name the metal A of which the object is made.

When a grey coloured object made of metal A is left exposed to damp air for a considerable time, it gets covered with a red-brown flaky coating by the process called B which eats up the whole object gradually. It is said that the presence of C and D is necessary for this process to take place. If this object is galvanised by metal E, then the process B does not occur. Name the metal E.

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NTA MOCK TESTS-NTA NEET SET 104-CHEMISTRY
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  2. Which of the following attraction is strongest?

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  3. A metal gets coated with a green basic carbonate when exposed to atmos...

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  4. Dissolution of a solute is an exothermic process if

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  6. In the given reaction 'X' will be

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