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Class 11ChemistrySome Basic Concepts of ChemistryLaws of chemical combinationEasy
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A student compared masses in grams for the law of gaseous volumes. What is the correct correction?

Answer and explanation

Correct answer: Compare the volumes of gases at the same temperature and pressure

According to Gay-Lussac’s law of gaseous volumes, the volumes of reacting gases and gaseous products, measured at the same temperature and pressure, are in simple whole-number ratios. Therefore, volumes—not masses in grams—must be compared. Comparing masses at the same temperature and pressure is the closest distractor, but mass is not the basis of this law. Exam tip: whenever “gaseous volumes” is mentioned, check that temperature and pressure are the same.

Related tags

ChemistryLaw Of Gaseous VolumesGay-Lussac's LawChemical CombinationGas VolumeClass 11Laws Of Chemical CombinationSome Basic Concepts Of Chemistry
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10 more MCQs
  1. 1Who is commonly credited with formulating the law of conservation of mass?
  2. 2Which statement correctly describes the law of conservation of mass for a chemical reaction in a closed system?
  3. 3In which type of system can the total mass of a reacting sample be measured as remaining constant without accounting for matter exchanged with the surroundings?
  4. 4Who proposed the law of definite proportions, also known as the law of constant composition?
  5. 5What does the law of definite proportions state about a pure compound?
  6. 6In a pure sample of water, what happens to the mass ratio of hydrogen to oxygen?
  7. 7The law of multiple proportions is associated with which scientist?
  8. 8When does the law of multiple proportions apply?
  9. 9According to the law of multiple proportions, what is the ratio of the masses of one element that combine with a fixed mass of another element in different compounds?
  10. 10Who proposed the law of reciprocal proportions?
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