Class XI

Difficulty of discharge is lowest in
  1. Magnesium ions
  2. Copper ions
  3. Iron ions
  4. Calcium ions
Formula of Calcium chloride ionic bond is
  1. CaCl2
  2. Ca2Cl
  3. CaCl
  4. Ca3Cl2
Weak electrolytes include
  1. Weak acids
  2. Weak alkalis
  3. Strong bases
  4. Both A and B
After accepting electrons, Manganate Mn(VII) ion becomes oxidized to
  1. Mn (VI) ions
  2. Mn (V)
  3. Mn(III) ions
  4. Mn(II) ions
Bonding can be
  1. Metallic
  2. Covalent
  3. Ionic
  4. All of these
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