SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-3

  • question_answer
    Darkening property of photo chromatic glass is due to the presence of

    A)  silver bromide   

    B)  silver oxide

    C)  silver nitrate     

    D)         silver chloride  

    Correct Answer: D

    Solution :

     Silver Chloride has the unusual property of darkening when struck by light. It is this property that makes silver halide salts so useful for photographic films. This darkening occurs because light causes an electron transfer from \[C{{l}^{-}}\] to \[A{{g}^{+}}\] in the silver chloride crustal, where they aggregate to form a tiny crystal of silver metal which is opaque to light.


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