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IGCSE O Level Chemistry Competitive Exam MCQs – Mock Test 147

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Free "Valency & Chemical Formula Notes" App Download (iOS & Android): Natural gas consists of; MCQ with answers: ethane, methane, butane, and propane. Study Chemical Formulae and Equations Questions and Answers, Apple Book to download free chapter to improve chemistry readiness.

Valency & Chemical Formula MCQs – Mock Test 147 PDF Download

MCQ 731: Natural gas consists of:

  1. methane
  2. ethane
  3. propane
  4. butane

MCQ 732: A constant temperature at which a pure solid change into a pure liquid is called:

  1. latent heat of vaporization
  2. elevation in boiling point
  3. melting point
  4. boiling point

MCQ 733: Which is correct about neutral oxides?

  1. they are soluble in water
  2. they are insoluble in water
  3. they are metallic oxides
  4. none of above

MCQ 734: The glue hardens when it is squeezed out of the tube due to:

  1. solidification of solvent
  2. evaporation of solvent molecules
  3. evaporation of adhesive molecules
  4. evaporation of solute particles

MCQ 735: Consider the chemical reaction ZnCO3 + HNO3 → Al(NO3)3 + H2O, number of HNO3 molecules required for a balanced equation will be:

  1. 1
  2. 2
  3. 3
  4. 4

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