Question

Hawa me lambay samay Tak rehne par chandi ki vastue kali ho jati he iska karad bataye
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Answer 1

Answer:

लंबी अवधि के लिए हवा में संपर्क में क्यों चांदी काले रंग का हो जाता है

The silver article becomes black after sometimes when exposed to air because silver reacts with sulphur which is present in the atmosphere and then forms silver sulphide. Thus the layer of this silver sulphide is formed on the surface of the silver article so they appear as dull or black.

Explanation:

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Answer 2

Answer:

Silver oxygen ke sath react krke silver oxide bnata h aur silver oxide ke black layer ke Karan wo black dikhta h