SiO2 resists attack of H2,Cl2, most of acids and metals. Still it reacts with

SiO2 resists attack of H2,Cl2, most of acids and metals. Still it reacts with

  1. A

    NaOH

  2. B

    HF

  3. C

    F2

  4. D

    both (I) and (II)

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    Solution:

    SiO2+2NaOH Na2SiO3+H2O

    SiO2+4HF SiF4+2H2O

    SiO2+6HF HSiF6+2H2O

     

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