GATE CE 2022 Set 1 — Question 42
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.MCQ+2 / -0.67EasyDO, BOD & CODWater QualityEnvironmental Engineering
Environmental Engineering → Water Quality → DO, BOD & COD
Last updated
Question
Henry’s law constant for transferring from air into water, at room temperature, is . Given that the partial pressure of in the atmosphere is , the concentration of dissolved oxygen (mg/liter) in water in equilibrium with the atmosphere at room temperature is(Consider the molecular weight of as )
Correct answer
(A) 8.7
Solution
According to Henry's Law, the concentration of a dissolved gas () is proportional to its partial pressure () in the gas phase:Given:
Henry's law constant,
Partial pressure of , Calculating molar concentration:Converting to mass concentration (mg/L):
Molecular weight of
The closest option is 8.7.
Henry's law constant,
Partial pressure of , Calculating molar concentration:Converting to mass concentration (mg/L):
Molecular weight of
The closest option is 8.7.
Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE CE question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on Water Quality
2026 Set 1 Q21A rapid sand filter bed of depth m has % porosity during service cycle. It is…2026 Set 1 Q22The settling velocity of inorganic particles in the sedimentation tank of a water treatment plant…2026 Set 1 Q25Which of the following components is/are NOT removed in the secondary treatment of sewage?2026 Set 2 Q27Column I presents common air pollutants, and column II presents treatment technologies commonly…2026 Set 2 Q28One-third of the solid matter in a sludge containing water is composed of fixed mineral…