English

Assertion (A): Platinum and gold occur in native state in nature. Reason (R): Platinum and gold are noble metals.

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Question

Assertion (A): Platinum and gold occur in native state in nature.

Reason (R): Platinum and gold are noble metals.

Options

  • If both A and R are true, and R is the correct explanation of A.

  • If both A and R are true, but R is not the correct explanation of A.

  • If A is true, but R is false.

  • If both A and R are false.

MCQ
Assertion and Reasoning
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Solution

If both A and R are true, and R is the correct explanation of A.

Explanation:

The assertion is true because platinum and gold are consistently found in their free, uncombined (native) states in nature rather than as compound ores. The reason is also true and serves as the perfect explanation: these elements are highly stable noble metals with positive reduction potentials, meaning they are chemically unreactive and do not readily bond with environmental elements like oxygen, sulfur, or moisture.
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Chapter 7: Metallurgy - Exercises [Page 172]

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Frank Chemistry Part 2 [English] Class 10 ICSE
Chapter 7 Metallurgy
Exercises | Q 2. (d) | Page 172
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