Class XII

Which gas is evolved when urea is treated with NaOH?
  1. Nitrous oxide
  2. Laughing gas
  3. Ammonia
  4. Nitrogen
Which of the following is Paramagnetic?
  1. N2O
  2. NO
  3. None of these
  4. N2O5
Which colour is given by CuSO4 with ammonia?
  1. Blue
  2. White
  3. Orange
  4. Pink
Ozone can be detected by using
  1. Sodium
  2. None of these
  3. Silver
  4. Mercury
Ammonia is used in detection of
  1. Sodium ion
  2. Magnesium ion
  3. Potassium ion
  4. Copper ion
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