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Question

Which of the following is true for the given equation?

CaO(s)+H2O(l) Ca(OH)2(aq)+heat
  1. CaO is solid.
  2. H2O is liquid.
  3. H2O is in vapour state.
  4. Ca(OH)2 forms a solution with water


Solution

The correct options are
A CaO is solid.
B H2O is liquid.
D Ca(OH)2 forms a solution with water
The conventions (s), (l), (g), (aq) represents solid, liquid and solution in water.
In the equation, 

CaO(s) + H2O(l) Ca(OH)2 (aq) + Heat

 CaO is mentioned as (s), hence it is in solid state.

H2O is mentioned as (l), hence it is in liquid state and not in vapour state.

 Ca(OH)2 is mentioned as (aq), hence it forms a solution with water.

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