Class XI

Metal oxides
  1. Are basic oxides
  2. Are soluble in water
  3. Are called alkalis
  4. All of these
Acid salts cannot be formed by
  1. Sulphuric acid
  2. Carbonic acid
  3. Nitric acid
  4. Phosphoric acid
If Potassium Iodide (KI) acts as oxidizing agent, change occurs from, indicates presence of
  1. Colorless to brown
  2. Colorless to blue
  3. Brown to colorless
  4. Blue to colorless
Valency of all these ions is -2, except
  1. SO4
  2. SO3
  3. CO3
  4. HCO3
Soap is
  1. acidic
  2. alkaline
  3. neutral
  4. basic
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