Answer the following
Why is a mixture of helium and oxygen gas preferred over air for respiration during deep sea diving?

A gas mixture contains 2mol each of helium and oxygen gas. What will be the ratio of their (i) average kinetic energy, (ii) rms speed?

A porous container is filled with a mixture of hydrogen and oxygen gas. Which gas will leak faster and why?

Indicate the correct answer: rate of diffusion of helium gas at constant temperature and pressure will be four times of the rate of diffusion of which of the following gases-

Which of the following during respiration obtain water dissolved oxygen by diffusion through their body surface (a) Cnidarians (b) Fishes (c) Amphibians (d) Reptiles

100 mL of mixture of CO & CO_(2) is mixed with 30 mL of oxygen and sparked in eudiometer. Volume of residual gas after treatment with aqueous KOH was 10 mL which remains unchanged when treated with alkaline pyrogallate. Which of the following are correct-

External respiration allows the exchangeof carbon dioxide for oxygen at any altitue which of he following is not an adaptaion to living high abouve the sea level ?