Rashmi was doing an experiment in which she took two samples of silicon and tried burning in air.She observed that sample 1 caught fire easily in the air while the sample 2 didn't catch fire.Can you help her out in identifying them?

Sample 1 - Amorphous, Sample 2 - Crystalline

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Sample 1 - Crystalline, Sample 2- Amorphous

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Sample 1 - Amorphous, Sample 2 - Amorphous.

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Can't be identified

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Solution

The correct option is A Sample 1 - Amorphous, Sample 2 - Crystalline
The sample number 1 which caught fire is the amorphous silicon which when heated in air, it oxidizes at the surface level and it catches fire.While the sample number 2 is crystalline silicon which does not burn in air even when heated.

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