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Subjects
Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsEasy
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What is the correct method when mixing acid with water?

Answer and explanation

Correct answer: Add acid slowly to water

The governing safety principle is controlled dilution. Mixing a concentrated acid with water releases considerable heat. Adding acid slowly to a larger volume of water, while stirring carefully, allows the heat to disperse and reduces sudden boiling or splashing; hence option A is correct. Adding water to acid can make a small amount of water heat rapidly and eject corrosive acid. Heating beforehand is unsafe.

Related tags

Acid DilutionLaboratory SafetyExothermic MixingAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience
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10 more MCQs
  1. 1What type of substance turns blue litmus paper red?
  2. 2What type of substance turns red litmus paper blue?
  3. 3Which of the following substances acts as a natural indicator?
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  6. 6What is the nature of a solution whose pH is less than 7?
  7. 7At 25°C, a solution with a pH greater than 7 is of which nature?
  8. 8A student dips red litmus paper into a soap solution. What change will occur in the red litmus paper?
  9. 9Which gas is generally produced when dilute acids react with active metals?
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