SSC General Science & Technology Sample Paper NCERT Sample Paper-5

  • question_answer
    Brown spots on tooth surfaces are due to excess of which among the following minerals

    A)  Chlorine           

    B)  Bromine

    C)  Iodine  

    D)  Fluorine

    Correct Answer: D

    Solution :

    [d] Dental fluorosis (also termed mottled enamel) is hypomineralization of tooth enamel caused by ingestion of excessive fluoride during enamel formation. It appears as a range of visual changes in enamel causing degrees of intrinsic tooth discoloration.

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