Advertisements
Advertisements
प्रश्न
Account for the following:
Helium is used in diving apparatus.
Give reasons for the following :
Helium is used in diving apparatus as a diluent for oxygen.
Advertisements
उत्तर १
Helium mixed with oxygen under pressure is given to sea-divers for respiration. Air is not given to sea-divers because nitrogen present in air being soluble in blood will give a painful sensation called bends by bubbling out blood on moving from high pressure(in deep sea) to the atmospheric pressure.
उत्तर २
Air contains a large amount of nitrogen and the solubility of gases in liquids increases with increase in pressure. When sea divers dive deep into the sea, large amount of nitrogen dissolves in their blood. When they come back to the surface, solubility of nitrogen decreases and it separates from the blood and forms small air bubbles. This leads to a dangerous medical condition called bends. Therefore, air in oxygen cylinders used for diving is diluted with helium gas. This is done as He is sparingly less soluble in blood.
APPEARS IN
संबंधित प्रश्न
Which noble gas is used in filling balloons for meteorological observations?
Write the structures of the following molecule:
XeOF4
Draw the structure of the following:
XeO3
Balance the following equation:
\[\ce{XeF6 + H2O -> XeO2F2 + HF}\]
Give the formula and describe the structure of a noble gas species which is isostructural with:
\[\ce{ICI^-_4}\]
Complete the following reactions : XeF6 + 3H2O →
Write the electronic configuration of the following element:
Krypton (Z = 36)
Fill in the blanks by choosing the appropriate word/words from the brackets
(square pyramidal, electrical, 74; 26, sp3d2, sp3d, chemical, 68, 32, tetrahedral, yellow, white, iodoform, Lucas)
The geometry of XeOF4 molecule is ______ and the hybridisation of Xenon atom in the molecule is ________.
Draw the structure of XeF4.
The number of lone pairs of electrons present in ClF5:
Draw structure and name the shape of bromine trifluoride.
Which of the following fluorides does not exist?
Partial hydrolysis of XeF4 gives ____________.
In which of the following pairs, the two species are isostructural:
Substance having the lowest boiling point ______.
On partial hydrolysis, XeF6 gives ______.
The atomic radii of Zr and Hf are almost identical. This is because of
Which one of the following reactions of xenon compounds is not feasible?
Discuss the trends in electronegativity and atomic radii for elements of group 16 17, 18.
