Industrial Chemistry MCQs for MDCAT Practice

Chemistry section, Industrial Chemistry chapter. Sample questions from past PMC papers.

1. Question 1
   lf glass manufacturing process annealing is done for the prevention of:
   • A.Air bubbles
   • B.Impurities
   • C.Strain
   • D.Shining
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2. Question 2
   Which of the following is FALSE about condensation polymerisation?
   • A.Small molecules are eliminated during the reaction.
   • B.Bifunctional monomers react to form long chain polymers.
   • C.Condensation polymers form slowly as compared to addition polymers.
   • D.Unsaturated monomers react together to form long chain polymers.
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3. Question 3
   Which of the following is an example of a thermosetting polymer?
   • A.PVC pipes
   • B.Plastic toys
   • C.Polystyrene
   • D.Bakelite
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4. Question 4
   Why must contact adhesives be applied to both surfaces before joining?
   • A.To act as a lubricant
   • B.To prevent the surfaces from chemically reacting
   • C.To allow the solvent to dry so a bond forms quickly upon contact
   • D.To increase the temperature of the substrate
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5. Question 5
   Permanent hair dye typically contains which concentration of hydrogen peroxide?
   • A.0.50%
   • B.1-2%
   • C.3-6%
   • D.10-12%
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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?
   • A.NO2 catalyzes the formation of acid rain from atmospheric carbon dioxide
   • B.NO2 catalyzes the formation of acid rain from atmospheric sulfur dioxide
   • C.NO2 causes global warming due to the thinning of the ozone layer
   • D.NO2 is a greenhouse gas that contributes to global warming
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7. Question 7
   Which of the following occurs in the Contact Process?
   • A.Sulphur dioxide is dissolved in water
   • B.Sulphur trioxide is dissolved in water
   • C.Sulphur dioxide is dissolved in dilute sulphuric acid
   • D.Sulphur trioxide is dissolved in concentrated sulphuric acid
   • E.None of the above
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8. Question 8
   Which of the following polymer structures is most likely to exhibit rigidity and hardness due to extensive inter-chain bonding?
   • A.Linear polymer (2-D)
   • B.Branched polymer (3-D)
   • C.Linear polymer with low molecular mass
   • D.Cross-linked polymer (3-D interconnected)
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