Class X

Equilibrium constant can be used to
  1. predict direction of chemical reaction
  2. predict extent of chemical reaction
  3. determine the equilibrium concentration of mixture
  4. all of above
The refrigerant commonly used for domestic refrigerators is
  1. alcohol
  2. ammonia
  3. neon
  4. None of the above
Color of crude oil is
  1. brownish black
  2. white
  3. transparent
  4. light yellow
Conditions for equilibrium of concentration of reactant and products will be same if
  1. temperature is constant
  2. pressure or volume is constant
  3. concentration of products and reactants are same
  4. all of above
Process of converting minerals in to oxides is called
  1. smelting
  2. reigning
  3. roasting
  4. bessemerization
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