For extinguishing fire, we use – (1) Hydrogen (2) Carbon Monoxide (3) Carbon Dioxide (4) Marsh has

For extinguishing fire, we use – (1) Hydrogen (2) Carbon Monoxide (3) Carbon Dioxide (4) Marsh has
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(3) Carbon Dioxide Explanation: Fire extinguishers use carbon dioxide to displace the oxygen necessary for a fire to burn, extinguishing the blaze. Fires need oxygen, fuel, and heat to ignite, and removing any one of those three components can put out a fire. It is useful for electrical fires and some flammable liquid fires, but may make some gasoline or paper fires worse by dispersing burning material.
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For extinguishing fire, we use (1) Hydrogen (2) Carbon Monoxide (3) Carbon Dioxide (4) Marsh gas

Description : For extinguishing fire, we use (1) Hydrogen (2) Carbon Monoxide (3) Carbon Dioxide (4) Marsh gas

Last Answer : Carbon Dioxide

Marsh gas, formed from decaying organic matter and in coal mines is (a) carbon dioxide (b) methane (c) ethane (d) carbon monoxide

Description : Marsh gas, formed from decaying organic matter and in coal mines is (a) carbon dioxide (b) methane (c) ethane (d) carbon monoxide

Last Answer : Ans:(b)

Which gas is used in fire extinguishers? (1) Carbon dioxide (2) Nitrogen oxide (3) Carbon monoxide (4) Sulpher dioxide

Description : Which gas is used in fire extinguishers? (1) Carbon dioxide (2) Nitrogen oxide (3) Carbon monoxide (4) Sulpher dioxide

Last Answer : (1) Carbon dioxide Explanation: Sodium bicarbonate, regular or ordinary used on class B and C fires, was the first of the dry chemical agents developed. In the heat of a fire, it releases a cloud of carbon dioxide that smothers the fire.

The gas used to extinguish fire is – (1) Neon (2) Nitrogen (3) Carbon dioxide (4) Carbon monoxide

Description : The gas used to extinguish fire is – (1) Neon (2) Nitrogen (3) Carbon dioxide (4) Carbon monoxide

Last Answer : (3) Carbon dioxide Explanation: Fires require these 3 things: a fuel (a hydrocarbon, which is a compound containing only carbon and hydrogen), a source of oxygen, and heal. Carbon Dioxide is most commonly used to extinguish fire as it displaces wwgen, thus choking the very source of a fire.

Which gas is used as fire extinguisher? (1) Carbon dioxide (2) Carbon monoxide (3) Carbon suboxide (4) Sulphur dioxide

Description : Which gas is used as fire extinguisher? (1) Carbon dioxide (2) Carbon monoxide (3) Carbon suboxide (4) Sulphur dioxide

Last Answer : (1) Carbon dioxide Explanation: A fire extinguisher, flame extinguisher, or simply an extinguisher, is an active fire protection device used to extinguish or control small fires, often in ... separate cartridge that is punctured prior to discharge, exposing the propellant to the extinguishing agent.

The gas used to extinguish fire is (1) Neon (2) Nitrogen (3) Carbon dioxide (4) Carbon monoxide

Description : The gas used to extinguish fire is (1) Neon (2) Nitrogen (3) Carbon dioxide (4) Carbon monoxide

Last Answer : Carbon monoxide

Which gas is used as fire extinguisher ? (1) Carbon dioxide (2) Carbon monoxide (3) Carbon suboxide (4) Sulphur dioxide

Description : Which gas is used as fire extinguisher ? (1) Carbon dioxide (2) Carbon monoxide (3) Carbon suboxide (4) Sulphur dioxide

Last Answer : Carbon dioxide

Water gas is the mixture of – (1) carbon dioxide and hydrogen (2) carbon monoxide and nitrogen (3) carbon monoxide and hydrogen (4) carbon dioxide and nitrogen

Description : Water gas is the mixture of – (1) carbon dioxide and hydrogen (2) carbon monoxide and nitrogen (3) carbon monoxide and hydrogen (4) carbon dioxide and nitrogen

Last Answer : (3) carbon monoxide and hydrogen Explanation: Water gas, a mixture of carbon monoxide and hydrogen, is produced by treating carbon (in the form of coke or coal) with steam at high temperatures.

Gobar gas mainly contains – (1) Carbon dioxide (2) Carbon monoxide (3) Hydrogen sulphide (4) Methane

Description : Gobar gas mainly contains – (1) Carbon dioxide (2) Carbon monoxide (3) Hydrogen sulphide (4) Methane

Last Answer : (4) Methane Explanation: Biogas or Lobar gas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material ... (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.

Water gas is the mixture of (1) carbon dioxide and hydrogen (2) carbon monoxide and nitrogen (3) carbon monoxide and hydrogen (4) carbon dioxide and nitrogen

Description : Water gas is the mixture of (1) carbon dioxide and hydrogen (2) carbon monoxide and nitrogen (3) carbon monoxide and hydrogen (4) carbon dioxide and nitrogen

Last Answer : carbon monoxide and hydrogen

Gobar gas mainly contains (1) Carbon dioxide (2) Carbon monoxide (3) Hydrogen sulphide (4) Methane

Description : Gobar gas mainly contains (1) Carbon dioxide (2) Carbon monoxide (3) Hydrogen sulphide (4) Methane

Last Answer : Methane

On a cold winter night , the process sleeping in a room with closed door and windows with coal fire burning inside may die due to the excessive accumulation of a) nitrogen monoxide b) nitrogen dioxide c) carbon dioxide d) carbon monoxide

Description : On a cold winter night , the process sleeping in a room with closed door and windows with coal fire burning inside may die due to the excessive accumulation of a) nitrogen monoxide b) nitrogen dioxide c) carbon dioxide d) carbon monoxide

Last Answer : d) carbon monoxide

The main constituents of biogas are (a) methane and hydrogen (b) carbon monoxide and carbon dioxide (c) butane, propane and nitrogen (d) carbon dioxide and methane

Description : The main constituents of biogas are (a) methane and hydrogen (b) carbon monoxide and carbon dioxide (c) butane, propane and nitrogen (d) carbon dioxide and methane

Last Answer : Ans:(d)

Why are Calcium Carbide (CaC 2 ), Carbon monoxide (CO), Carbon dioxide (CO 2 ), Hydrogen cyanide (HCN) and calcium carbonate (CaCO 3 ) classified as inorganic compounds through they contain carbon?

Description : Why are Calcium Carbide (CaC 2 ), Carbon monoxide (CO), Carbon dioxide (CO 2 ), Hydrogen cyanide (HCN) and calcium carbonate (CaCO 3 ) classified as inorganic compounds through they contain carbon?

Last Answer : These compounds contain only one or two carbon atoms per formula unit and contain no carbon-carbon (C-C) bonds or carbon-hydrogen bonds. Hence they are classified as inorganic compounds.

Which of the following is the most toxic gas? A. Carbon dioxide B. Carbon monoxide (Answer) C. Nitrogen D. Hydrogen

Description : Which of the following is the most toxic gas? A. Carbon dioxide B. Carbon monoxide (Answer) C. Nitrogen D. Hydrogen

Last Answer : B. Carbon monoxide (Answer)

Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it milky. Identify A,B and C. (a) A is sodium hydrogen carbonate ,B is hydrous sodium carbonate and c is carbon dioxide (b)A is sodium carbonate ,B is sodium hydrogen carbonate and c is Carbon monoxide © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c

Description : Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it ... © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c

Last Answer : (d) both a and c

Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage? (A) Smog & ozone (B) Hydrogen fluoride & nitrogen oxides (C) Sulphur dioxide & spray of weed killers (D) Carbon monoxide

Description : Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage? (A) Smog & ozone (B) Hydrogen fluoride & nitrogen oxides (C) Sulphur dioxide & spray of weed killers (D) Carbon monoxide

Last Answer : (D) Carbon monoxide

The following are green house gases a. Methane, carbon dioxide, carbon monoxide b. Methane, water vapour, carbon sulphide c. Carbon dioxide, hydrogen sulphide, hydrogen cyanide d. Carbon dioxide, Carbon monoxide, hydrogen cyanide

Description : The following are green house gases a. Methane, carbon dioxide, carbon monoxide b. Methane, water vapour, carbon sulphide c. Carbon dioxide, hydrogen sulphide, hydrogen cyanide d. Carbon dioxide, Carbon monoxide, hydrogen cyanide

Last Answer : a. Methane, carbon dioxide, carbon monoxide

Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) oxygen and hydrogen x) ozone and methane y) nitrous oxide and sulfur dioxide z) methane and carbon dioxide e) ozone and carbon monoxide

Description : Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) oxygen and hydrogen x) ozone and methane y) nitrous oxide and sulfur dioxide z) methane and carbon dioxide e) ozone and carbon monoxide

Last Answer : ANSWER: Z -- METHANE AND CARBON DIOXIDE

(4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn Explanation: Water is not effective in extinguishing a fire caused by petrol because water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn. The specific gravity (or relative density) of gasoline ranges from 0.71-0.77 kg/l (719.7 kg/m3) while the specific gravity of water is 1000 kg/m3 and that is why gasoline or petrol floats on the upper surface of the water. Water cannot generally be used to extinguish a gasoline fire, unless used in a fine mist.

Description : (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn Explanation: Water is not effective in extinguishing a fire caused by petrol because water and ... . Water cannot generally be used to extinguish a gasoline fire, unless used in a fine mist.

Last Answer : "All the four quantum numbers of two electrons in an atom are not the same." It is the law of (1) Hund’s (2) Exclusion Principle of Pauli (3) Uncertainty Principle of Giesenberg (4) Avogadro’s law

Water is not effective in extinguishing a fire caused by petrol because (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are miscible with each other (4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn

Description : Water is not effective in extinguishing a fire caused by petrol because (1) the flame is too hot for water to cool it down (2) water and petrol react chemically (3) water and petrol are ... 4) water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn

Last Answer : water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn

Where should you aim a fire extinguisher and stream when extinguishing a fire?

Description : Where should you aim a fire extinguisher and stream when extinguishing a fire?

Last Answer : At the base of the fire.

Which of the listed devices may be installed on a large diesel-electric alternating current propulsion generator? A. Temperature detector coils inserted in the stator slots for measuring stator temperature. B. A CO2 fire extinguishing system. C. Electric space heaters to prevent condensation of moisture. D. All of the above.

Description : Which of the listed devices may be installed on a large diesel-electric alternating current propulsion generator? A. Temperature detector coils inserted in the stator slots for measuring stator temperature. B. ... . C. Electric space heaters to prevent condensation of moisture. D. All of the above.

Last Answer : Answer: D

Which of the listed devices may be installed on a large turbo-electric alternating current propulsion generator? A. Temperature detector coils inserted in the stator slots for measuring stator temperature. B. A CO2 fire extinguishing system. C. Electric space heaters to prevent condensation of moisture. D. All of the above.

Description : Which of the listed devices may be installed on a large turbo-electric alternating current propulsion generator? A. Temperature detector coils inserted in the stator slots for measuring stator temperature. B. A ... . C. Electric space heaters to prevent condensation of moisture. D. All of the above.

Last Answer : Answer: D

Which gas is used for extinguishing fire?

Description : Which gas is used for extinguishing fire?

Last Answer : Carbondioxide

. Bromine is used in the preparation of(A) Fire extinguishing compounds (B) Fire proofing agents (C) Dyes and antiknock compounds (D) All (A), (B) and (C)

Description : . Bromine is used in the preparation. of (A) Fire extinguishing compounds (B) Fire proofing agents (C) Dyes and antiknock compounds (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Water is not effective in extinguishing a fire caused by petrol because

Description : Water is not effective in extinguishing a fire caused by petrol because

Last Answer : Water and petrol are immiscible with each other and petrol which forms upper Layer continuous to burn

Describe fire extinguishing method.

Description : Describe fire extinguishing method.

Last Answer : (i) Carbon Dioxide Extinguishing Systems  This type is the most suitable & widely recommended one for electrical fires. Carbon dioxide (CO2) extinguishers are normally Class C ... particles to expand chemically inhibiting combustion and expelling the oxygen thereby smothering the flames.

Write short notes on fire extinguishing methods adopted in electrical engineering.

Description : Write short notes on fire extinguishing methods adopted in electrical engineering. 

Last Answer : Stand 6 to 8 feet away from the fire and follow the four-step PASS procedure. If the fire does not begin to go out immediately, leave the area at once. Always be sure ... fire causing the particles to expand chemically inhibiting combustion and expelling the oxygen thereby smothering the flames. 

Which type of fire extinguisher is suited for extinguishing electrical fire?

Description : Which type of fire extinguisher is suited for extinguishing electrical fire?

Last Answer : Which type of fire extinguisher is suited for extinguishing electrical fire? Carbon – Dioxide Fire Extinguisher.

Acid rain is caused by, the pollution of environment by - (1) carbon dioxide and nitrogen (2) carbon monoxide and carbon dioxide (3) ozone and carbon dioxide (4) nitrous oxide and sulphur dioxide

Description : Acid rain is caused by, the pollution of environment by - (1) carbon dioxide and nitrogen (2) carbon monoxide and carbon dioxide (3) ozone and carbon dioxide (4) nitrous oxide and sulphur dioxide

Last Answer : (1) carbon dioxide and nitrogen

Acid rain is caused by the pollution of environment by - (1) carbon dioxide and nitrogen (2) carbón monoxide and carbon dioxide (3) ozone and carbon dioxide (4) nitrous oxide and sulphur dioxide

Description : Acid rain is caused by the pollution of environment by - (1) carbon dioxide and nitrogen (2) carbón monoxide and carbon dioxide (3) ozone and carbon dioxide (4) nitrous oxide and sulphur dioxide

Last Answer : (4) nitrous oxide and sulphur dioxide

What are the components responsible for acid rain? (1) Nitrogen monoxide (NO) and Carbon monoxide (CO) (2) Sulphur dioxide (SO2) and Nitrogen oxides (NOx) (3) Carbon dioxide (CO2) and Carbon monoxide (CO) (4) Oxides of carbon (COx) and Oxides of nitrogen (NOx)

Description : What are the components responsible for acid rain? (1) Nitrogen monoxide (NO) and Carbon monoxide (CO) (2) Sulphur dioxide (SO2) and Nitrogen oxides (NOx) (3) Carbon dioxide (CO2) and Carbon monoxide (CO) (4) Oxides of carbon (COx) and Oxides of nitrogen (NOx)

Last Answer : (2) Sulphur dioxide (SO2) and Nitrogen oxides (NOx) Explanation: Acid rain is caused by emissions of sulfur dioxide (SO2) and nitrogen oxide (NO), which react with the water molecules in the ... in acid rain can cause paint to peel, corrosion of steel structures and weathering of stone buildings.

Acid rain is caused by the pollution of environment by – (1) Carbon monoxide and Carbon dioxide (2) Ozone and Carbon dioxide (3) Nitrous oxide and Sulphur dioxide (4) Carbon dioxide and Nitrogen

Description : Acid rain is caused by the pollution of environment by – (1) Carbon monoxide and Carbon dioxide (2) Ozone and Carbon dioxide (3) Nitrous oxide and Sulphur dioxide (4) Carbon dioxide and Nitrogen

Last Answer : (3) Nitrous oxide and Sulphur dioxide Explanation: Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances ... acidic pollutants, known as acid rain. Human activities are the main cause of acid rain.

Which one of the following group of gases contribute to the "Green House Effect"? (1) Carbon dioxide and Methane (2) Ammonia and Ozone (3) Carbon monoxide and Sulphur dioxide (4) Carbon tetrailouride and Nitrous oxide

Description : Which one of the following group of gases contribute to the "Green House Effect"? (1) Carbon dioxide and Methane (2) Ammonia and Ozone (3) Carbon monoxide and Sulphur dioxide (4) Carbon tetrailouride and Nitrous oxide

Last Answer : (1) Carbon dioxide and Methane Explanation: The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. When ranked by their direct contribution to the greenhouse ... 72 %, Carbon Dioxide: 9- 26 %, Methane: 4-9 % and Ozone: 3-7 %.

Which of the following auto mobile gases is not considered to be an air pollutant? (1) Carbon dioxide (2) Carbon monoxide (3) Sulfur dioxide (4) Nitrogen dioxide

Description : Which of the following auto mobile gases is not considered to be an air pollutant? (1) Carbon dioxide (2) Carbon monoxide (3) Sulfur dioxide (4) Nitrogen dioxide

Last Answer : (1) Carbon dioxide Explanation: There are mainly six air pollutants: carbon monoxide lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide.

The gas causing acid rain in an industrial area is - (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Methane

Description : The gas causing acid rain in an industrial area is - (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Methane

Last Answer : (3) Sulphur dioxide Explanation: The main gases responsible for causing acid rain are sulphur dioxide as well as nitrous oxides. The main sources of sulphur dioxide are metal working industries and coalfired power stations whereas nitrous oxide is from vehicles and fuel combustion.

Which one out of the following helps in burning? (1) Oxygen (2) Carbon monoxide (3) Nitrogen (4) Carbon dioxide

Description : Which one out of the following helps in burning? (1) Oxygen (2) Carbon monoxide (3) Nitrogen (4) Carbon dioxide

Last Answer : (1) Oxygen Explanation: Karl Scheele, the Swedish chemist, was the first to prepare oxygen by heating mercuric oxide in 1772. Joseph Priestley, the English chemist, also prepared oxygen in 1774 ... on mercuric oxide. Its elemental nature was, however, established by the French chemist, Lavoisier.

Which one of the following contributes largely to the ‘green house effect’? (1) Ozone (2) Carbon monoxide (3) Carbon dioxide (4) Water vapour

Description : Which one of the following contributes largely to the ‘green house effect’? (1) Ozone (2) Carbon monoxide (3) Carbon dioxide (4) Water vapour

Last Answer : (4) Water vapour Explanation: The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. When these gases are ranked by their direct contribution to the ... dioxide: 9-26 per cent; Methane: 4-9 per cent; and Ozone: 3-7 per cent.

Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth? (1) Carbon dioxide (2) Oxygen (3) Carbon monoxide (4) Nitrogen

Description : Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth? (1) Carbon dioxide (2) Oxygen (3) Carbon monoxide (4) Nitrogen

Last Answer : (1) Carbon dioxide Explanation: Carbon dioxide is a green house gas that absorbs heat radiated from the Sun as well as re-radiated heat from the Earth's surface.

The gas produced in marshy places due to decomposition of vegetation is – (1) Carbon monoxide (2) Carbon dioxide (3) Sulphur dioxide (4) Methane

Description : The gas produced in marshy places due to decomposition of vegetation is – (1) Carbon monoxide (2) Carbon dioxide (3) Sulphur dioxide (4) Methane

Last Answer : (4) Methane Explanation: Methane gas is a hydrocarbon gas largely composed of methane formed when organic material or vegetation decays in the absence of air. Naturally occurring methane is mainly produced by the process of methanogenesis. It is also known as Swamp Gas.

Which of the following gases is produced due to incomplete combustion of fuel? (1) Carbon Dioxide (2) Carbon Monoxide (3) Methane (4) Ethane

Description : Which of the following gases is produced due to incomplete combustion of fuel? (1) Carbon Dioxide (2) Carbon Monoxide (3) Methane (4) Ethane

Last Answer : (2) Carbon Monoxide Explanation: Carbon monoxide (CO) is an odorless, colorless gas formed by the incomplete com bustion of fuels. It is produced from the partial oxidation of carbon-containing com pounds; it forms when there is not enough oxygen to produce carbon dioxide.

The biogas used for cooking is a mixture of which of the following? (1) Carbon dioxide and oxygen (2) Isobutane and propane (3) Methane and Carbon monoxide (4) Methane and carbon dioxide

Description : The biogas used for cooking is a mixture of which of the following? (1) Carbon dioxide and oxygen (2) Isobutane and propane (3) Methane and Carbon monoxide (4) Methane and carbon dioxide

Last Answer : (4) Methane and carbon dioxide Explanation: Biogas is essentially a mixture of Methane (CH4, around 55-75%) but also contains Carbon Dioxide (CO3), around 25- 30%), varying quantities of Water ( ... ) and Carbon Monoxide (CO). Methane is the valuable component under the aspect of using biogas fuel.

The most common cause of pollution of air is – (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Smoke

Description : The most common cause of pollution of air is – (1) Carbon dioxide (2) Carbon monoxide (3) Sulphur dioxide (4) Smoke

Last Answer : (3) Sulphur dioxide Explanation: The most common sources of air pollution include particulates, ozone, nitrogen dioxide, and sulfur dioxide. The largest sources of SO2 emissions are from fossil fuel ... non-road equipment. It is linked with a number of adverse effects on the respiratory system.

The gas that causes suffocation and death when coal or coke is burnt in a closed room is - (1) Methane (2) Ethane (3) Carbon monoxide (4) Carbon dioxide

Description : The gas that causes suffocation and death when coal or coke is burnt in a closed room is - (1) Methane (2) Ethane (3) Carbon monoxide (4) Carbon dioxide

Last Answer : (3) Carbon monoxide Explanation: Exhaust fumes of motor cars, gases produced, from coal fire in a closed room and coal gas, all contain carbon monoxide, which is the cause of their ... is stable compound. This causes oxygen starvation in the body tissues and eventually causes death by suffocation.

The ‘Green House effect' is produced due to the presence of excess amount of – (1) Sulphur dioxide (2) Nitrogen dioxide (3) Carbon monoxide (4) Methane

Description : The ‘Green House effect' is produced due to the presence of excess amount of – (1) Sulphur dioxide (2) Nitrogen dioxide (3) Carbon monoxide (4) Methane

Last Answer : (4) Methane Explanation: By their percentage contribution to the greenhouse effect on Earth the four major gases are: Water vapour (36-70%), Carbon dioxide (9-26%), Methane (4-9%) and Ozone (3- 7%).

The major harmful gas emitted by automobile vehicle which causes air pollution is – (1) Carbon Monoxide (2) Methane (3) Carbon dioxide (4) Ozone gas

Description : The major harmful gas emitted by automobile vehicle which causes air pollution is – (1) Carbon Monoxide (2) Methane (3) Carbon dioxide (4) Ozone gas

Last Answer : (1) Carbon Monoxide Explanation: Carbon monoxide is the major harmful gas emitted by the automobile vehicles which causes air pollution. Carbon monoxide (CO) - A product of incomplete combustion, ... overexposure (carbon monoxide poisoning) may be fatal. Carbon Monoxide poisoning is a major killer.

An example of major air pollutant is – (1) Oxygen (2) Carbon monoxide (3) Helium (4) Carbon dioxide

Description : An example of major air pollutant is – (1) Oxygen (2) Carbon monoxide (3) Helium (4) Carbon dioxide

Last Answer : (2) Carbon monoxide Explanation: Carbon monoxide (CO) is a colourless, odorless, non-irritating but very poisonous gas which is a product by incomplete combustion of fuel such as natural gas, coal or wood. Vehicular exhaust is a major source of carbon monoxide.

The greenhouse effect is caused by the higher level of which gas in the atmosphere? (1) Carbon monoxide (2) Carbon dioxide (3) Nitrous oxide (4) Sulphur dioxide

Description : The greenhouse effect is caused by the higher level of which gas in the atmosphere? (1) Carbon monoxide (2) Carbon dioxide (3) Nitrous oxide (4) Sulphur dioxide

Last Answer : (2) Carbon dioxide Explanation: The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all ... the absence of the gases. The environmental effects of carbon dioxide are of significant interest.

Which one out of the following helps in burning? (1) carbon dioxide (2) oxygen (3) carbon monoxide (4) nitrogen

Description : Which one out of the following helps in burning? (1) carbon dioxide (2) oxygen (3) carbon monoxide (4) nitrogen

Last Answer : (2) oxygen Explanation: Oxygen is the gas that helps / supports combustion (burning). Nitrogen itself does not support burning (though it forms nitrides with some metals). So, air also supports burning.