Chemically, dry ice is (a) ice formed from pure distilled water (b) solid carbon dioxide (c) solid sulphur dioxide (d) ice kept at sub-zero temperatures

Chemically, dry ice is (a) ice formed from pure distilled water (b) solid carbon dioxide (c) solid sulphur dioxide (d) ice kept at sub-zero temperatures
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What is dry ice? (1) Solid Carbon dioxide (2) Solid Nitrogen dioxide (3) Solid Sulphur dioxide (4) Solid Water

Description : What is dry ice? (1) Solid Carbon dioxide (2) Solid Nitrogen dioxide (3) Solid Sulphur dioxide (4) Solid Water

Last Answer : (1) Solid Carbon dioxide Explanation: Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. Its advantages include lower temperature than that of water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere).

Dry ice is – (1) solid ammonia (2) solid sulphur dioxide (3) dry carbon dioxide gas (4) solid carbon dioxide

Description : Dry ice is – (1) solid ammonia (2) solid sulphur dioxide (3) dry carbon dioxide gas (4) solid carbon dioxide

Last Answer : (4) solid carbon dioxide Explanation: Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and ... . It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.

Dry ice is (1) solid ammonia (2) solid sulphur dioxide (3) dry carbon dioxide gas (4) solid carbon dioxide

Description : Dry ice is (1) solid ammonia (2) solid sulphur dioxide (3) dry carbon dioxide gas (4) solid carbon dioxide

Last Answer :  solid carbon dioxide

Dry ice is ------? A. Methane hydrate B. Liquid Nitrogen C. Solid Carbon dioxide (Answer) D. Frozen Water E. None of these

Description : Dry ice is ------? A. Methane hydrate B. Liquid Nitrogen C. Solid Carbon dioxide (Answer) D. Frozen Water E. None of these

Last Answer : C. Solid Carbon dioxide (Answer)

Dry ice is the solid form of : (1) Air 7 (2) Carbon dioxide (3) Nitrogen (4) Water

Description : Dry ice is the solid form of : (1) Air 7 (2) Carbon dioxide (3) Nitrogen (4) Water

Last Answer : (2) Carbon dioxide Explanation: Dry ice, sometimes referred to as "cardice," is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower tem- ... . It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.

Dry ice is (a) Solid carbon dioxide (b) Ice dust (c) Liquified nitrogen (d) Liquified hydrogen

Description : Dry ice is (a) Solid carbon dioxide (b) Ice dust (c) Liquified nitrogen (d) Liquified hydrogen

Last Answer : Ans:(a)

Chemical Name of Dry Ice? A. Solid Carbon Dioxide (Answer) B. Calcium Carbon C. A&B D. Sodium Oxide

Description : Chemical Name of Dry Ice? A. Solid Carbon Dioxide (Answer) B. Calcium Carbon C. A&B D. Sodium Oxide

Last Answer : A. Solid Carbon Dioxide (Answer)

What is Dry Ice? A. Solid Oxygen B. Solid Carbon Dioxide (Answer) C. Solid Hydrogen D. Solid Nitrogen

Description : What is Dry Ice? A. Solid Oxygen B. Solid Carbon Dioxide (Answer) C. Solid Hydrogen D. Solid Nitrogen

Last Answer : B. Solid Carbon Dioxide (Answer)

"Dry ice" is (A) Moisture free ice (B) Solid helium (C) Solid carbon dioxide (D) None of these

Description : "Dry ice" is (A) Moisture free ice (B) Solid helium (C) Solid carbon dioxide (D) None of these

Last Answer : (C) Solid carbon dioxide

Dry ice is the solid form of what gas? w) nitrogen x) oxygen y) helium z) carbon dioxide

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

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

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.

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 ice (3) Arctic Sea ice, Carbon dioxide, Global Temperature, Sea level and Land ice. (4) None of these

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.

Carbon dioxide is formed when to oxygen atoms chemically combined with a carbon atom which term best describes carbon dioxide?

Description : Carbon dioxide is formed when to oxygen atoms chemically combined with a carbon atom which term best describes carbon dioxide?

Last Answer : Ggg

Because less coal is consumed in this system, emissions of ______ and particulate and solid waste by products are reduced. a. Sulphur dioxide (SO2) b. Nitrogen oxide (NOx) c. Carbon dioxide (CO2) d. All of the above.

Description : Because less coal is consumed in this system, emissions of ______ and particulate and solid waste by products are reduced. a. Sulphur dioxide (SO2) b. Nitrogen oxide (NOx) c. Carbon dioxide (CO2) d. All of the above.

Last Answer : d. All of the above.

The chemicals most commonly used for cloud seeding or artificial rainmaking' is/are (1) Silver Iodide (2) Sodium Chloride (3) Dry ice or frozen carbon dioxide (4) (4) All the above

Description : The chemicals most commonly used for cloud seeding or artificial rainmaking' is/are (1) Silver Iodide (2) Sodium Chloride (3) Dry ice or frozen carbon dioxide (4) (4) All the above

Last Answer : (1) Silver Iodide Explanation: Cloud seeding, a form of intentional weather modification, is the attempt to change the amount or type of precipitation that falls from clouds, by dispersing ... common chemicals used for cloud seeding include silver iodide and dry ice (solid carbon dioxide).

The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are (1) Silver Iodide (2) Sodium Chloride (3) Dry ice or frozen carbon dioxide (4) All the above

Description : The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are (1) Silver Iodide (2) Sodium Chloride (3) Dry ice or frozen carbon dioxide (4) All the above

Last Answer : Silver Iodide

Diamond is chemically (a) a mixture of metal carbonates (b) pure carbon (c) a pure form of sand (d) a mixture of calcium and magnesium phosphates

Description : Diamond is chemically (a) a mixture of metal carbonates (b) pure carbon (c) a pure form of sand (d) a mixture of calcium and magnesium phosphates

Last Answer : Ans:(b)

Mist is caused by – (1) dry ice (2) ice at low temperature (3) water vapour at low temperature (4) carbon-monoxide in solid form

Description : Mist is caused by – (1) dry ice (2) ice at low temperature (3) water vapour at low temperature (4) carbon-monoxide in solid form

Last Answer : (3) water vapour at low temperature Explanation: Mist is a phenomenon caused by small droplets of water suspended in air. It can occur as part of natural weather or volcanic activity, and ... canisters if the humidity conditions are right. The only difference between mist and fog is visibility.

Dry ice is the solid form of : (1) Air (2) Carbon di–oxide (3) Nitrogen (4) Water

Description : Dry ice is the solid form of : (1) Air (2) Carbon di–oxide (3) Nitrogen (4) Water

Last Answer : Carbon di–oxide

Mist is caused by (1) dry ice (2) ice at low temperature (3) water vapour at low temperature (4) carbon-monoxide in solid form

Description : Mist is caused by (1) dry ice (2) ice at low temperature (3) water vapour at low temperature (4) carbon-monoxide in solid form 

Last Answer : water vapour at low temperature

Which of the following statements is not true about diamonds? (a) It is the purest form of carbon (b) It is the hardest naturally occurring substance (c) It is a good conductor of electricity (d) Artificial diamonds can be prepared by subjecting a solution of pure carbon in iron to very high pressures and temperatures

Description : Which of the following statements is not true about diamonds? (a) It is the purest form of carbon (b) It is the hardest naturally occurring substance (c) It is a good conductor of ... diamonds can be prepared by subjecting a solution of pure carbon in iron to very high pressures and temperatures

Last Answer : Ans:(c)

What happens when? a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. b) A pinch of mercuric oxide is kept in a test tube. c)A small crystal of silver nitrate is dissolved in distilled water and a drop of ammonium hydroxide & a pinch of glucose powder are added.

Description : What happens when? a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. b) A pinch of mercuric oxide is kept in a test tube. c)A small crystal of silver nitrate is dissolved in distilled water and a drop of ammonium hydroxide & a pinch of glucose powder are added.

Last Answer : a) A cleaned iron plate or iron nail is kept in 10g of copper sulphate solution. After a few hours a coating of copper is seen on iron nail/plate. It is based on displacement reaction. ... on the inner walls of the test tube. Aldehyde group in glucose reduced silver nitrate to metallic silver.

Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at 35°C (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C (C) Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C (D) A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Description : Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at ... flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Last Answer : (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C

The sources of sulphur dioxide may be: 1. burning of coal 2. solid municipality waste disposal 3. burning of diesel 4. volcanoes The correct sources are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Description : The sources of sulphur dioxide may be: 1. burning of coal 2. solid municipality waste disposal 3. burning of diesel 4. volcanoes The correct sources are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Last Answer : Ans:(b)

What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius? (1) All ice will melt (2) All water will become ice (3) No change will happen (4) Only some ice will melt

Description : What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius? (1) All ice will melt (2) All water will become ice (3) No change will happen (4) Only some ice will melt

Last Answer : (3) No change will happen Explanation: Fresh water cooled to zero (0) degree Celsius and subjected to additional loss of heat energy normally will freeze. A mixture of fresh water and ice ... the usual freezing point while remaining liquid. Such cloud droplets are composed of super cooled water.

What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius ? (1) All ice will melt (2) All water will become ice (3) No change will happen (4) Only some ice will melt

Description : What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius ? (1) All ice will melt (2) All water will become ice (3) No change will happen (4) Only some ice will melt

Last Answer : No change will happen

Steps taken by the Government of India to control air pollution include (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons (b) permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles (c) use of non-polluting compressed natural gas (CNG) only as fuel by all buses and trucks (d) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Description : Steps taken by the Government of India to control air pollution include (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and ... trucks (d) compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Last Answer : (a) compulsory PUC (Pollution under control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons

Pick out the wrong statement. (A) Cp of monatomic gases such as metallic vapor is about 5 kcal/kg.atom (B) The heat capacity of solid inorganic substance is exactly equal to the heatcapacity of the substance in the molten state(C) There is an increase in entropy, when a spontaneous change occurs in anisolated system(D) At absolute zero temperature, the heat capacity for many pure crystallinesubstances is zero

Description : Pick out the wrong statement. (A) Cp of monatomic gases such as metallic vapor is about 5 kcal/kg.atom (B) The heat capacity of solid inorganic substance is exactly equal to the ... isolated system (D) At absolute zero temperature, the heat capacity for many pure crystalline substances is zero

Last Answer : (C) There is an increase in entropy, when a spontaneous change occurs in an isolated system

The gas dissolved in water that makes it basic is – (1) ammo (2) sulphur dioxide (3) hydrogen (4) carbon dioxide

Description : The gas dissolved in water that makes it basic is – (1) ammo (2) sulphur dioxide (3) hydrogen (4) carbon dioxide

Last Answer : (2) sulphur dioxide Explanation: Ammonia has that dissolves in water forms a solution of ammonium hydroxide (NH4OH). This solution (including the gas) is a strong base and will make the solution alkaline.

The gas dissolved in water that makes it basic is : (1) ammonia (2) sulphur dioxide (3) hydrogen (4) carbon dioxide

Description : The gas dissolved in water that makes it basic is : (1) ammonia (2) sulphur dioxide (3) hydrogen (4) carbon dioxide

Last Answer : ammonia

Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon gases carburise the surface of steel at annealing temperatures (C) Active nitrogen (formed by cracking ammonia at the metal surface) cause nitride formation with increase in surface hardness (D) None of these

Description : Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon ... the metal surface) cause nitride formation with increase in surface hardness (D) None of these

Last Answer : (D) None of these

A sample of pure carbon dioxide, irrespective of its source contains 27.27% carbon and 72.73% oxygen. The data supports [AIIMS 1992] (A) Law of constant composition (B) Law of conservation of mass (C) Law of reciprocal proportions (D) Law of multiple proportions

Description : A sample of pure carbon dioxide, irrespective of its source contains 27.27% carbon and 72.73% oxygen. The data supports [AIIMS 1992] (A) Law of constant composition (B) Law of conservation of mass (C) Law of reciprocal proportions (D) Law of multiple proportions

Last Answer : (A) Law of constant composition

Which among the following is pure matter ? (1) Carbon–dioxide (2) Brass (3) Air (4) Iron

Description : Which among the following is pure matter ? (1) Carbon–dioxide (2) Brass (3) Air (4) Iron

Last Answer : Carbon–dioxide

Dough kept overnight in warm weather becomes soft and spongy because of (a) absorption of carbon dioxide from atmosphere (b) fermentation (c) cohesion (d) osmosis.

Description : Dough kept overnight in warm weather becomes soft and spongy because of (a) absorption of carbon dioxide from atmosphere (b) fermentation (c) cohesion (d) osmosis.

Last Answer : (b) fermentation

For determine the specific gravity of soil solids, using a pycnometer of 500 cc., the following data is available : Weight of dry empty pycnometer = 125 g Weight of dried soil and pycnometer = 500 g Weight of dried soil and distilled = 850 g water filled in pycnometer up to top The specific gravity of soil solids, is (A) 2.0 (B) 2.25 (C) 2.50 (D) 2.75

Description : For determine the specific gravity of soil solids, using a pycnometer of 500 cc., the following data is available : Weight of dry empty pycnometer = 125 g Weight of dried soil and pycnometer = 500 g Weight of dried soil and distilled ... of soil solids, is (A) 2.0 (B) 2.25 (C) 2.50 (D) 2.75

Last Answer : (C) 2.50

The substances that cause air pollution are 1. Smoke 2. Sulphur dioxide 3. Argon 4. Carbon monoxide The correct answers are: (a) 1, 2 and 3 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 4

Description : The substances that cause air pollution are 1. Smoke 2. Sulphur dioxide 3. Argon 4. Carbon monoxide The correct answers are: (a) 1, 2 and 3 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 4

Last Answer : Ans:(d)

The compound that IS NOT responsible for acid rain is (a) nitrogen dioxide (b) nitrogen pentoxide (c) Sulphur dioxide (d) carbon monoxide

Description : The compound that IS NOT responsible for acid rain is (a) nitrogen dioxide (b) nitrogen pentoxide (c) Sulphur dioxide (d) carbon monoxide

Last Answer : Ans:(d)

Coal burning power plants and factories are responsible for about 86% of - (a) carbon monoxide in the atmosphere (b) sulphur dioxide in the atmosphere (c) chlorine in the atmosphere (d) nitrogen dioxide in the atmosphere

Description : Coal burning power plants and factories are responsible for about 86% of - (a) carbon monoxide in the atmosphere (b) sulphur dioxide in the atmosphere (c) chlorine in the atmosphere (d) nitrogen dioxide in the atmosphere

Last Answer : Ans:(b)

The yellow colour in photochemical smog is due to the presence of------? A. Sulphur dioxide B. Carbon dioxide C. Nitrogen dioxide (Answer) D. CFC’s

Description : The yellow colour in photochemical smog is due to the presence of------? A. Sulphur dioxide B. Carbon dioxide C. Nitrogen dioxide (Answer) D. CFC’s

Last Answer : C. Nitrogen dioxide (Answer)

The most serious air pollutant causing health hazard is – (1) Sulphur dioxide (2) Carbon monoxide (3) Ozone (4) Nitrogen oxide

Description : The most serious air pollutant causing health hazard is – (1) Sulphur dioxide (2) Carbon monoxide (3) Ozone (4) Nitrogen oxide

Last Answer : (1) Sulphur dioxide Explanation: Sulphur dioxide (SO2) is considered as the most serious single air pollutant causing health hazard, obstructing breathing. It always leads to airways inflammation, ... , pulmonary oedema, heart failure and circulatory collapse. It is also responsible for acid rain.

Transboundary pollution (or) Acid rain is caused by – (1) Carbon monoxide (2) Carbon dioxide (3) Hydrocarbon (4) Nitrogen oxide and sulphur dioxide

Description : Transboundary pollution (or) Acid rain is caused by – (1) Carbon monoxide (2) Carbon dioxide (3) Hydrocarbon (4) Nitrogen oxide and sulphur dioxide

Last Answer : (4) Nitrogen oxide and sulphur dioxide Explanation: Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions ( ... dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.

The gas released during photosynthesis : (1) Carbon dioxide (2) Oxygen (3) Carbon monoxide (4) Sulphur dioxide

Description : The gas released during photosynthesis : (1) Carbon dioxide (2) Oxygen (3) Carbon monoxide (4) Sulphur dioxide

Last Answer : (2) Oxygen Explanation: In plants, algae, and cyanobacteria, photosynthesis uses carbon dioxide and water, releasing oxygen as a waste product. Photosynthesis is vital for all aerobic life on Earth. In ... this process is: Carbon dioxide + Water + Light energy --> Carbohydrate + Oxygen + Water

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 one of the following is-a greenhouse gas? (1) Nitrogen (2) Helium (3) Carbon dioxide (4) Sulphur dioxide

Description : Which one of the following is-a greenhouse gas? (1) Nitrogen (2) Helium (3) Carbon dioxide (4) Sulphur dioxide

Last Answer : (3) Carbon dioxide Explanation: Gases which absorb outgoing terrestrial rediation are called greenhouse gases, such as water vapour, methane, chlorofluorocarbons, and carbon 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 of the following is usually not an air-pollutant? (1) Hydrocarbons (2) Sulphur dioxide (3) Carbon dioxide (4) Nitrous oxide

Description : Which of the following is usually not an air-pollutant? (1) Hydrocarbons (2) Sulphur dioxide (3) Carbon dioxide (4) Nitrous oxide

Last Answer : (4) Nitrous oxide Explanation: The six air pollutants are carbon monoxide, lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide. The combustion of gasoline and other ... as laughing gas, is used in surgery and dentistry for its an-aesthetic and analgesic effects.