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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Which Mixture is Used for Respiration by Deep Sea Divers?

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प्रश्न

Which mixture is used for respiration by deep sea divers?

(A) He + O2

(B) Ne + O2

(C) Ar + O2

(D) Kr + O2

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उत्तर

He + O2

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2012-2013 (October)

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संबंधित प्रश्‍न

What is the effect of temperature on solubility of a gas in a liquid?


Why do gases always tend to be less soluble in liquids as the temperature is raised?


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The air is a mixture of a number of gases. The major components are oxygen and nitrogen with approximate proportion of 20% is to 79% by volume at 298 K. The water is in equilibrium with air at a pressure of 10 atm. At 298 K if the Henry’s law constants for oxygen and nitrogen are 3.30 × 107 mm and 6.51 × 107 mm respectively, calculate the composition of these gases in water.


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Henry’s law constant of oxygen is 1.4 × 10–3 mol lit–1 atm–1 at 298 K. How much of oxygen is dissolved in 100 ml at 298 K when the partial pressure of oxygen is 0.5 atm?


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(a) nature of solute

(b) temperature

(c) pressure

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(ii) (a) and (b) at constant P

(iii) (b) and (c) only

(iv) (c) only


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Assertion (A): Helium is used to dilute oxygen in diving apparatus.

Reason (R): Helium has high solubility in O.

In the light of the above statements, choose the correct answer from the options given below:


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