Class IX

Methanol and water are
  1. miscible
  2. non miscible
  3. forms saturated solution
  4. forms supersaturated solution
When tiny particles of a substance are dispersed through medium then mixture is called
  1. alloys
  2. amalgams
  3. suspension
  4. colloid
In air nitrogen gas acts as
  1. solute
  2. solvent
  3. gaseous solute
  4. aqueous solute
Molarity of solution which contains 40 g urea dissolved in 500cm3 is
  1. 1.2 M
  2. 1.389 M
  3. 1.334 M
  4. 1.5 M
. To prepare ammonia gas, gaseous mixture of
  1. hydrogen and chlorine is used
  2. hydrogen and nitrogen is used
  3. hydrogen and helium is used
  4. hydrogen and iodine is used
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