Q87
General ScienceChemistry
Law of definite proportion is obeyed in
- a.Stoichiometry
- b.electrometry
- c.photometry
- d.spectrometer
Answer: (A) Stoichiometry
Stoichiometry, the calculation of quantities in compounds and reactions, rests on the law of definite proportions: a compound always contains its elements in a fixed ratio by mass. Electrometry, photometry and spectrometry are measurement techniques, not branches based on this law.