What is clinker ?
Correct answer: C. roasted calcareous and argillaceous material
- A. roasted calcareous material
- B. roasted argillaceous material
- C. roasted calcareous and argillaceous material
- D. roasted gypsum
Explanation
Clinker forms when the calcareous material, mainly limestone, and argillaceous material, containing clay and silica, are heated together in the kiln. The resulting hot, hard nodules contain compounds formed from CaO, SiO2, Al2O3 and Fe2O3. Students may choose a or b by treating clinker as coming from only one raw material.
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About Exothermic and Endothermic Reactions
Exothermic reactions release heat to the surroundings and have negative enthalpy change, while endothermic reactions absorb heat and have positive enthalpy change. The topic uses energy profiles to identify reactants, products and activation energy, and includes bond energy, enthalpy diagrams, calorimetry and Hess's law for calculating overall heat changes.
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728 free Thermochemistry and Energetics of Chemical Reactions MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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