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ESCA gives sufficient chemical information up to a depth about ________ armstrong in polymers.

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ESCA gives sufficient chemical information up to a depth about ________ armstrong in polymers.

(a) 5-20

(b) 15-40

(c) 40-100

(d) 100-200

This question was addressed to me in my homework.

Query is from Electron Spectroscopy for Chemical Analysis topic in portion Electron and Ion Spectrometers of Analytical Instrumentation

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The correct option is (c) 40-100

Best explanation: ESCA gives sufficient chemical information up to a depth about 40-100 armstrong in polymers. ESCA is also known as X-ray photoelectron spectroscopy.

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