Class VII

When state of matter is changed from liquid to gas, we call it
  1. melting
  2. freezing
  3. boiling
  4. condensing
When solids are heated, they
  1. expand more than liquids
  2. expands more than gases but less than liquids
  3. expand more than liquids but less than gases
  4. expand less than liquids and gases both
Ethene is a/an
  1. alkane
  2. alkene
  3. alcohol
  4. carboxylic acid
Turning milk into curd is a
  1. physical change
  2. physical property
  3. chemical change
  4. chemical property
Fireworks contain two elements we have recently studied, and those are
  1. magnesium and iron
  2. iron and Sulphur
  3. magnesium and Sulphur
  4. iron and oxygen
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