Class IX

Which of the following is a compound?
  1. Stainless steel
  2. Bronze
  3. Graphite
  4. Hydrogen sulphide
The smell of hydrogen sulphide (HS) gas is
  1. pleasant
  2. rotten eggs
  3. of burning sulphur
  4. None of these
Cloud is an example of
  1. liquid dispersed in a gas
  2. solid dispersed in a gas
  3. liquid dispersed in a solid
  4. solid dispersed in a solid
The Brownian movement in colloids is due to:
  1. Tyndall effect
  2. Charge on colloidal solution
  3. Collisions between colloidal particles and with dispersion medium
  4. All of these
Which of the following is not a compound?
  1. Sulphur dioxide
  2. Chalk
  3. Lead
  4. Sulphuric acid
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