Class VII

Long chains of atoms are linked by
  1. hydrogen
  2. oxygen
  3. nitrogen
  4. carbon
Any characteristic that gives a sample of matter the ability/inability to undergo a change that alters its composition. It is called ______.
  1. physical change
  2. chemical change
  3. physical peoprty
  4. chemical prpoerty
When methane is combusted, products formed are
  1. Carbon dioxide and Water
  2. Carbon dioxide and Hydrogen
  3. Oxygen and Hydrogen
  4. Nitrogen and Oxygen
Vibration of particles in solids at fixed position is due to
  1. kinetic energy
  2. forces of attraction
  3. pressure on atoms
  4. charge on particles
The process of obtaining Salt by the evaporation of sea water is known as _ . 
  1. Crystallisation 
  2. Crystallisssation 
  3. Galvanisation 
  4. Amalgamation 
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