Question
Download Solution PDFTo which of the following Dalton's law of partial pressures is not applicable?
This question was previously asked in
Indian Army Nursing Assistant (Technical) Berhampore 2020 Official Paper
Answer (Detailed Solution Below)
Option 1 : NH3 and HCl
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Detailed Solution
Download Solution PDFThe correct answer is NH3 and HCl
- Dalton's law is applicable only to a mixture of non-reacting gases.
- Ammonia (NH3) reacts with hydrochloric acid at normal temperature and gives ammonium chloride(NH4Cl).
- NH3 + HCl → NH4Cl
- So, this gaseous mixture does not follow Dalton's law.
Dalton's law:
- Dalton's law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases.
- This empirical law was observed by John Dalton in 1801.
- It was published in 1802.
- It is also called Dalton's law of partial pressures.
- Dalton's law is related to the ideal gas laws.
- Dalton's law is not strictly followed by real gases, with the deviation increasing with pressure.
Important Points
- Helium is a noble gas that will not react with hydrogen gas, so this gaseous mixture follows Dalton’s law.
- Nitrogen gas is not reactive in normal temperatures because the breakdown of nitrogen into atomic form is a highly endothermic process.
- Nitrogen and oxygen gas are not found in their atomic form in normal temperatures, so these gases will not react with each other.
Last updated on Mar 18, 2025
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