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IGCSE O Level Chemistry MCQs – Mock Test 110

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Pure Substances & Mixtures MCQs – Mock Test 110 PDF Download

MCQ 546: The melting point of silicon is:

  1. 410 °C
  2. 110 °C
  3. 140 °C
  4. 1410 °C

MCQ 547: Through the separating funnel, immiscible solutions:

  1. cannot be dissolved
  2. cannot be separated completely
  3. can be easily decanted
  4. can be centrifuged

MCQ 548: Mass of an electron is:

  1. 1⁄1840 of a proton only
  2. 1⁄1840 of a neutron only
  3. 1860 times of a proton
  4. 1⁄1840 of a proton and neutron

MCQ 549: Monosodium Glutamate (MSG) is added in food for what?

  1. preservation
  2. flavoring
  3. quick cooking
  4. Decolourization

MCQ 550: In electrolysis of dilute HCl, at the cathode:

  1. oxygen gas is given off
  2. hydrogen gas is given off
  3. chlorine gas is given off at anode
  4. hydrogen chloride is given off

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