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IGCSE O Level Chemistry MCQs – Mock Test 54

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Pure Substances & Mixtures MCQs – Mock Test 54 PDF Download

MCQ 266: Fresh seawater is referred to as impure water because it contains:

  1. oxygen
  2. aquatic animals
  3. aquatic plants
  4. dissolved salts

MCQ 267: Distillate formed after distillation is a/an:

  1. diluted solution
  2. impure solution
  3. condensed solution
  4. concentrated solution

MCQ 268: Common covalent bonds include:

  1. MgO
  2. KF
  3. LiCl
  4. CH4

MCQ 269: Acid salt formed by Phosphoric acid and sodium phosphate is:

  1. sodium hydrogen phosphate NaHPO4
  2. sodium dihydrogen phosphate NaH2PO4
  3. sodium trihydrogen phosphate Na2H3PO4
  4. sodium tetrachloro phosphate NaCH4Cl4

MCQ 270: NH4 has:

  1. positive charge
  2. double positive charge
  3. negative charge
  4. double negative charge

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