Class XI

In fractionating column of fractional distillation, higher in column
  1. Temperature becomes lower
  2. Temperature becomes higher
  3. Minimum absorption is carried out
  4. Risks of sublimation exists
Full shell of valence electrons make
  1. Metals
  2. Non metals
  3. Inert gases unreactive
  4. Isotopes
Oil and water is an example of
  1. Miscible
  2. Impure substances may also form crystals
  3. Filtrate
  4. Suspension
Rain water has a pH of
  1. 1
  2. 4
  3. 5
  4. 7
Toothpaste has an average pH of
  1. 0
  2. 4
  3. 8
  4. 12
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