Class IX

Solubility of Na2SO4
  1. increases with increase in temperature
  2. decreases with increase in temperature
  3. no effect on solubility with change in temperature
  4. none of above
In amalgams solvent is
  1. gas
  2. liquid
  3. solid
  4. none of above
colloid
  1. less than 103 nm
  2. 102 nm
  3. greater than 103
  4. 10 nm
Methanol and water are
  1. miscible
  2. non miscible
  3. forms saturated solution
  4. forms supersaturated solution
When NaCl is dissolved in water, negative end of water molecules is attracted towards
  1. Cl
  2. H
  3. He
  4. Na
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