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Class 11ChemistrySome Basic Concepts of ChemistryLaws of chemical combinationEasy
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If (CO) has 16 grams oxygen with fixed carbon and (CO_2) has 32 grams oxygen with same carbon what is the ratio?

Answer and explanation

Correct answer: 1:2

For the same fixed mass of carbon, the masses of oxygen are 16 g and 32 g. Therefore, the ratio is 16:32 = 1:2. The ratio 2:1 is the reverse order, so it is not correct. Exam tip: simplify a ratio by dividing both terms by their greatest common factor.

Related tags

ChemistryChemical CombinationLaw Of Multiple ProportionsStoichiometryMass RatioClass 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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