Class XI

 Milk has a pH of
  1. 2
  2. 3
  3. 4
  4. 6
Displacement reaction occurs when
  1. A more reactive non-metal displaces less reactive non-metals
  2. A more reactive metal displaces a less reactive metal
  3. Metal lower in reactivty series is added
  4. Both A and B
Rare freezing of sea water can be explained through
  1. Iowering freezing point of water
  2. Presence of impurities like salts
  3. Presence of breathing animals in it
  4. Elevation of boiling point
 To balance Al(OH)3 + HNO3 → Al(NO3)3 + H2O, number of HNO3 molecules required will be
  1. 2
  2. 4
  3. 6
Consider equation: Fe+3(aq) + 3OH-(aq) → Fe(OH)3(s). precipitate of Iron(III) Hydroxide will be of
  1. Green color
  2. Blue color
  3. Brown color
  4. White color
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