Cement is a mixture of________________?
Correct answer: B. clay lime stone and gypsum
- A. clay and clinker
- B. clay lime stone and gypsum
- C. lime stone and gypsum
- D. lime stone and clay
Explanation
In simplified descriptions, cement is made from calcareous material such as limestone, argillaceous material such as clay, and a small amount of gypsum. Gypsum is added after clinker formation to regulate setting, while limestone and clay provide the main oxides. Students may choose a because clinker is the principal cement component, but option a omits gypsum and clay as raw-material contributors.
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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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