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Industrial Chemistry MCQs for MDCAT Practice

Chemistry section, Industrial Chemistry chapter. Up to eight free sample questions, each with the correct answer and a worked explanation. The full chapter opens in the app.

The bank has 690 active questions on this chapter. Your first 500 practice attempts are free, and every attempt includes a worked explanation.

  1. Question 1
    lf glass manufacturing process annealing is done for the prevention of:
    • Air bubbles
    • Impurities
    • Strain (correct answer)
    • Shining
    Correct answer: C
    Annealing in glass manufacturing prevents internal stress and cracking by allowing controlled cooling, thus preserving structural integrity.
  2. Question 2
    Which of the following is FALSE about condensation polymerisation?
    • Small molecules are eliminated during the reaction.
    • Bifunctional monomers react to form long chain polymers.
    • Condensation polymers form slowly as compared to addition polymers.
    • Unsaturated monomers react together to form long chain polymers. (correct answer)
    Correct answer: D
    Condensation polymerization requires monomers with functional groups that react to eliminate small molecules; unsaturated monomers typically undergo addition polymerization.
  3. Question 3
    Which of the following is an example of a thermosetting polymer?
    • PVC pipes
    • Plastic toys
    • Polystyrene
    • Bakelite (correct answer)
    Correct answer: D
    Differentiates between thermosetting and thermoplastic polymers by identifying Bakelite as a cross-linked, infusible thermoset.
  4. Question 4
    Why must contact adhesives be applied to both surfaces before joining?
    • To act as a lubricant
    • To prevent the surfaces from chemically reacting
    • To allow the solvent to dry so a bond forms quickly upon contact (correct answer)
    • To increase the temperature of the substrate
    Correct answer: C
    Contact adhesives bond via solvent evaporation; applying to both surfaces allows sufficient drying for rapid, strong adhesion upon joining.
  5. Question 5
    Permanent hair dye typically contains which concentration of hydrogen peroxide?
    • 0.50%
    • 1-2%
    • 3-6% (correct answer)
    • 10-12%
    Correct answer: C
    Permanent hair dyes utilize a specific concentration range of hydrogen peroxide (3-6%) to effectively alter hair color by oxidation. Lower concentrations are insufficient for permanent color change, while higher ones pose safety risks.
  6. Question 6
    In power stations where hydrocarbon fuels are burned in air, nitrogen dioxide, NO2, is present in the exhaust gases. In modern power stations the NO2 is removed from the exhaust gases. A group of students asked why it is important to remove NO2 from the exhaust gases from power stations. Which is the most important reason to remove NO2?
    • NO2 catalyzes the formation of acid rain from atmospheric carbon dioxide
    • NO2 catalyzes the formation of acid rain from atmospheric sulfur dioxide
    • NO2 causes global warming due to the thinning of the ozone layer
    • NO2 is a greenhouse gas that contributes to global warming (correct answer)
    Correct answer: D
    NO2 removal from power station exhaust is crucial to prevent its contribution to global warming and stratospheric ozone depletion, not acid rain.
  7. Question 7
    Which of the following occurs in the Contact Process?
    • Sulphur dioxide is dissolved in water
    • Sulphur trioxide is dissolved in water
    • Sulphur dioxide is dissolved in dilute sulphuric acid
    • Sulphur trioxide is dissolved in concentrated sulphuric acid (correct answer)
    • None of the above
    Correct answer: D
    The Contact Process synthesizes H2SO4 by reacting SO3 with conc. H2SO4 to form oleum (H2S2O7), not directly with water.
  8. Question 8
    Which of the following polymer structures is most likely to exhibit rigidity and hardness due to extensive inter-chain bonding?
    • Linear polymer (2-D)
    • Branched polymer (3-D)
    • Linear polymer with low molecular mass
    • Cross-linked polymer (3-D interconnected) (correct answer)
    Correct answer: D
    Cross-linked polymers, with their extensive 3D network, possess superior rigidity and hardness due to strong inter-chain covalent bonds compared to linear or branched structures.

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Read the full Industrial Chemistry chapter notes: Industrial Chemistry notes. Or browse every chapter.