An aqueous solution of potash alum gives .......

  • A
    Two types of ions
  • B
    Only one type of ion
  • C
    Four types of ions
  • D
    Three types of ions

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Many ionic crystals dissolve in water because

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$I$. Ion-ion$a$. $1/r$
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$III$. London dispersion$c$. $1/r^{3}$
$d$. $1/r^{6}$

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The attractive interactions between cations and mobile electrons in metallic solid is called

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