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प्रश्न
Assertion (A): Platinum and gold occur in native state in nature.
Reason (R): Platinum and gold are noble metals.
पर्याय
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
विधान आणि तर्क
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उत्तर
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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