Description : In preference to nitrogen -oxygen mixture (present in air), a helium -oxygen mixture is used by divers in deep sea because helium (a) is less toxic than nitrogen (b) can readily mix with oxygen ... ) is lighter than nitrogen (d) is less soluble in blood than nitrogen at high pressure under the sea
Last Answer : Ans:(d)
Description : In deep-sea diving, divers use a mixture of gases consisting of oxygen and – (1) hydrogen (2) nitrogen (3) argon (4) helium
Last Answer : (2) nitrogen Explanation: Air is not the "ideal" breathing mixture for diving as with a concentration of approximately 79 percent nitrogen, compressed air poses two potential problems for all divers: ... Nitrox, a gaseous mixture of nitrogen and oxygen. It is also known as 'Enriched Air.'
Description : In deep-sea diving, divers use a mixture of gases consisting of oxygen and (1) hydrogen (2) nitrogen (3) argon (4) helium
Last Answer : nitrogen
Description : Helium is added to the oxygen supply of deep sea divers because it is (1) less poisonous than nitrogen (2) Lighter than nitrogen (3) Readily miscible with oxygen (4) less soluble in blood than nitrogen at high pressure
Last Answer : less soluble in blood than nitrogen at high pressure
Description : (4) less soluble in blood than nitrogen at high pressure Explanation: Deep-sea divers have their oxygen supply mixed with helium in order to avoid the toxic nature of oxygen under extreme pressures. The ... blood which blocks blood flow as the diver comes to the surface of the sea from underwater.
Last Answer : The chemical bahaviour of an atom depends upon - (1) the number of protons in its nucleus (2) the number of neutrons in the nucleus (3) the number of electrons orbiting around the nucleus (4) the number of nucleons in the nucleus
Description : The gas used to dilute oxygen for breathing by deep sea divers is- (1) Neon (2) Argon (3) Nitrogen (4) Helium
Last Answer : (4) Helium Explanation: Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
Description : The gas used to dilute oxygen for breathing by deep sea divers is: (1) Neon (2) Argon (3) Nitrogen (4) Helium
Last Answer : Helium
Description : The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is: (1) Neon (2) Argon (3) Krypton (4) Helium
Description : The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is – (1) Neon (2) Krypton (3) Argon (4) Helium
Last Answer : (4) Helium Explanation: Helium is used by deep sea divers because it reduces the narcosis of nitrogen and it remains below the oxygen toxicity limits. In fact, they use tri mix of Oxygen, helium and a little bit of nitrogen.
Description : The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is - (1) Xenon (2) Krypton (3) Argon (4) Helium
Last Answer : (4) Helium Explanation: Trimix is a breathing gas, consisting of oxygen, helium and nitrogen, and is often used in deep commercial diving. The helium is included as a substitute for some ... possible to create mixes suitable for different depths or purposes by adjusting the proportions of each gas.
Description : The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is (1) Xenon (2) Krypton (3) Argon (4) Helium
Description : Oxygen The gases which are used by divers as an artificial atmosphere are helium and _____. A. Oxygen B. Nitrogen C. Neon D. Carbon monoxide
Last Answer : ANSWER: A
Description : Helium The gases which are used by divers as an artificial atmosphere are helium and _____. A. Oxygen B. Nitrogen C. Neon D. Carbon monoxide
Description : The gases which are used by divers as an artificial atmosphere are helium and _____. A. Oxygen B. Nitrogen C. Neon D. Carbon monoxide
Description : Which of the following gases is mixed with oxygen for breathing by divers in aqualungs? (1) Methane (2) Nitrogen (3) Helium (4) Hydrogen
Last Answer : (2) Nitrogen Explanation: For some diving, has mixtures other than normal atmospheric air (21 % oxygen, 78% nitrogen, 1% trace gases) can be used, so long as the diver is properly ... reducing the likelihood of decompression sickness or allowing longer exposure to the same pressure for equal risk.
Last Answer : Nitrogen
Description : Sea divers go deep in the sea water with a mixture of which of the following gases
Last Answer : Sea divers go deep in the sea water with a mixture of which of the following gases A. `O_(2)` and He B. `O_(2 ... (2)` and `CO_(2)` D. `CO_(2)` and Ar
Description : Which among the following is used to dilute oxygen in the gas cylinders used by divers? (1) Krypton (2) Argon (3) Helium (4) Neon
Last Answer : (3) Helium Explanation: Helium is used to dilute the oxygen and nitrogen to reduce these affects. Helium is the gas of choice to use because it is an inert gas, is thinner, therefore more compressible than air, and its narcotic properties are negligible in comparison to nitrogen.
Description : Which among the following is used to dilute oxygen in the gas cylinders used by divers ? (1) Krypton (2) Argon (3) Helium (4) Neon
Description : what- The deep sea divers kept warm by wearing suits that water could not penetrate?
Last Answer : pass into
Description : In the diving apparatus, helium is used along with oxygen, because it is (A) Easily available (B) Not soluble in blood at high pressure (C) Lighter than nitrogen (D) Completely miscible with oxygen
Last Answer : (B) Not soluble in blood at high pressure
Description : If there are 3 moles of hydrogen 6 moles of oxygen and 9 moles of helium in a 10 L vessel at 27 and degC the total pressure of the gas mixture will be?
Last Answer : What is the answer ?
Description : Look at the following gases: 1. Carbon dioxide 2. Helium 3. Nitrogen 4. Oxygen The two most abundant gases in the atmosphere are: (a) 1 and 3 (b) 2 and 4 (c) 3 and 4 (d) 1 and 4
Last Answer : Ans:(c)
Description : In which of the following groups, are the elements written in the descending order of their respective atomic weights? (a) Nitrogen, carbon, oxygen, hydrogen (b) Oxygen, argon, nitrogen, hydrogen (c) Oxygen, nitrogen, helium, hydrogen (d) Oxygen, nitrogen, helium, bromine
Description : Carbon monoxide is an inflammable gas. Which one of the following is also inflammable? (1) Helium (2) Nitrogen (3) Oxygen (4) Hydrogen
Last Answer : (4) Hydrogen Explanation: At standard temperature and pressure, hydrogen is a colourless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic has with the molecular ... important role in acid-base chemistry with many reactions exchanging protons between soluble molecules.
Description : The gas which turns into liquid at the lowest temperature among the following is – (1) hydrogen (2) oxygen (3) helium (4) nitrogen
Last Answer : (1) hydrogen Explanation: Liquid hydrogen (LH2) is the liquid state, of the element hydrogen. Hydrogen is found naturally in the molecular H2 form. To exist as a liquid, H2 must ... method of obtaining liquid hydrogen involves a compressor resembling a jet engine in both appearance and principle.
Description : In the atmosphere ultraviolet rays are absorbed by – (1) Oxygen (2) Nitrogen (3) Ozone (4) Helium
Last Answer : (1) Oxygen Explanation: Most of the ultraviolet radiation in sunlight is absorbed by oxygen in Earth's atmosphere, which forms the ozone layer of the lower stratosphere. UV light is found ... and causes many substances to glow or fluoresce. Most ultraviolet is classified as non-ionizing radiation.
Description : Which are the only two elements on the periodic table that are liquid at room temperature? A. Mercury and Bromine (Answer) B. Carbon and helium C. Nitrogen and Hydrogen D. Oxygen and Neon
Last Answer : A. Mercury and Bromine (Answer)
Description : The gases which are used by drivers as an artificial atmosphere are helium and-------? A. Nitrogen B. Oxygen (Answer) C. Neon D. Carbon monoxide
Last Answer : B. Oxygen (Answer)
Description : In the manufacture of banaspati ghee the gas used is -----? A. Helium B. Hydrogen (Answer) C. Oxygen D. Nitrogen
Last Answer : B. Hydrogen (Answer)
Description : “Azotobacter” bacteria is known for biological fixation of which atmospheric gas? a. A Oxygen b. B Nitrogen c. C Carbon Dioxide d. D Helium
Last Answer : b. B Nitrogen
Description : Frasch process is for (A) Making oxygen (B) Producing helium (C) Mining sulphur (D) Making nitrogen
Last Answer : (C) Mining sulphur
Description : What kind of gas inflates in an airbag a) Hydrogen b) Oxygen c) Helium d) Nitrogen
Last Answer : d) Nitrogen
Description : In human flesh, the three light elements which predominate, and allow greater amount of incident X-rays to pass through them are a) oxygen, nitrogen , hydrogen b) oxygen, hydrogen, helium c) oxygen, hydrogen, carbon d) carbon, nitrogen, oxygen
Last Answer : c) oxygen, hydrogen, carbon
Description : The gas which was identified in the Sun using spectroscopy before its discovery on earth, is a) oxygen b) hydrogen c) helium d) nitrogen
Last Answer : c) helium
Description : Alpha particles are nuclei of: w) hydrogen x) helium y) oxygen z) nitrogen
Last Answer : ANSWER: X -- HELIUM
Description : Dry ice is the solid form of what gas? w) nitrogen x) oxygen y) helium z) carbon dioxide
Last Answer : ANSWER: Z -- CARBON DIOXIDE
Description : Which two gases are used to disinfect water in sewage treatment facilities? w) helium and nitrogen x) ozone and chlorine y) oxygen and hydrogen z) nitrogen and chlorine
Last Answer : ANSWER: X -- OZONE AND CHLORINE
Last Answer : Hydrogen
Description : The gas which turns into liquid at the lowest temperature among the following is (1) hydrogen (2) oxygen (3) helium (4) nitrogen
Last Answer : hydrogen
Description : In the atmosphere ultraviolet rays are absorbed by (1) Oxygen (2) Nitrogen (3) Ozone (4) Helium
Last Answer : Oxygen
Description : __________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section. (A) Nitrogen (B) Hydrogen (C) Helium (D) Carbon dioxide
Last Answer : (A) Nitrogen
Description : How do deep sea fish get oxygen?
Last Answer : I’m cringing right now because you’re going to get blasted for saying “fishes”. lol Aren’t there oxygen bubbles in the water or something?
Description : The ultra violet radiations of the Sun do not reach the Earth because the upper layers of the atmosphere contain (a) oxygen (b) helium (c) ozone (d) hydrogen
Description : The five key indicators of global climate change of our planet are (1) Antartic Sea ice, Oxygen, Rain-fall, Drought and Sea level (2) Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ice (3) Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice (4) None of these
Last Answer : (3) Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice.
Description : The five key indicators of global climate change of our planet are : (1) Antartic Sea ice, Oxygen, Rainfall, Drought and Sea level (2) Sea-level, Rising temperatures, Rainfall, Nitrogen and Arctic Sea ... Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice. (4) None of these
Last Answer : Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice.
Description : Pick out the wrong statement. (A) Minimum number of degree of freedom of a system is zero (B) Degree of freedom of a system containing a gaseous mixture of helium, carbon ... ) Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation
Last Answer : (D) Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation