Description : Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas? (A) Hydrogen (B) Acetylene (C) Carbon monoxide (D) Ammonia
Last Answer : (B) Acetylene
Description : The widest explosive limit is of __________, thereby making it the most explosive gas. (A) Acetylene (B) Petrol vapor (C) Hydrogen (D) Carbon monoxide
Last Answer : (A) Acetylene
Description : In general, the limit of inflammability/explosion limit of fuel gases is widened by the (A) Increase in gas pressure (B) Increase in temperature (i.e. preheating) (C) Use of pure oxygen for combustion instead of air (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Domestic cooking gas consists mostly of (1) methane and ethane (2) liquefied butane and isobutene (3) hydrogen and acetylene (4) ethylene and carbon monoxide
Last Answer : (2) liquefied butane and isobutene Explanation: Domestic gas is another name for Liquefied Petroleum Gas (LPG). Varieties of LPG bought and sold include mixes that are primarily propane (C3H8), primarily ... propane and butane, depending on the season - in winter more propane, in summer more butane.
Description : Domestic cooking gas consists mostly of (1) methane and ethane (2) liquified butane and isobutane (3) hydrogen and acetylene (4) ethylene and carbon monoxide
Last Answer : liquified butane and isobutane
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
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
Description : The gas which may cause explosion in sewers, is A. Carbondioxide B. Methane C. Ammonia D. Carbon monoxide
Last Answer : ANS: B
Description : Which one of the following Greenhouse gases has the greatest warming effect? A. Carbon dioxide B. Methane C. Carbon monoxide D. Helium
Last Answer : ANSWER: A
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 %.
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.
Description : Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) ozone and methane x) nitrous oxide and sulfur dioxide y) methane and carbon dioxide z) ozone and carbon monoxide
Last Answer : ANSWER: Y -- METHANE AND CARBON DIOXIDE
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 tetraflouride and Nitrous oxide
Last Answer : Carbon dioxide and Methane
Description : Blast furnace gas compared to coke oven gas has (A) Lower ignition temperature (B) Narrower limit of inflammability (C) Higher calorific value (D) Lower theoretical flame temperature
Last Answer : (D) Lower theoretical flame temperature
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)
Description : Consider the following statements: 1. Detergents do not produce lather with hard water 2. Water gas is a mixture of carbon monoxide and hydrogen 3. Methane is the chief constituent of CNG 4. LPG contains mainly n-butane 5. The correct ... (b) 1,3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only
Last Answer : Ans:(c)
Description : The gas that usually causes explosions in coal mines is - (1) Hydrogen (2) Carbon monoxide (3) Air (4) Methane
Last Answer : (4) Methane Explanation: Methane is extremely flammable and may form explosive mixtures with air. Methane is violently reactive with oxidizers, halogens, and some halogen-containing compounds. Methane gas explosions are responsible for many deadly mining disasters.
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.
Description : The gas usually causing explosions in coal mines is – (1) Hydrogen (2) Carbon monoxide (3) Air (4) Methane
Last Answer : (4) Methane Explanation: Firedamp is flammable gas found in coal mines. It is the name given to a number of flammable gases, especially methane.
Description : The gas that usually causes explosions in coal mines is (1) Hydrogen (2) Carbon monoxide (3) Air (4) Methane
Last Answer : Methane
Description : Gobar gas mainly contains (1) Carbon dioxide (2) Carbon monoxide (3) Hydrogen sulphide (4) Methane
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
Description : The chief constituent of gobar gas is (a) Methane (b) Carbon dioxide (c) Acetylene (d) Ethylene
Last Answer : Ans:(a)
Description : Which gas is produced after the application of Calcium Carbide to the fruits, for rapid ripening? a. Methane b. Carbon-di-oxide c. Acetylene d. Ethylene
Last Answer : c. Acetylene
Description : 'Utilities' in a chemical process plant includes compressed air, steam, water, electrical power, oxygen, acetylene, fuel gases etc. Utility costs for ordinary chemical process plants ranges roughly from __________ percent of the total product ... 1 to 5 (B) 10 to 20 (C) 25 to 35 (D) 35 to 45
Last Answer : (B) 10 to 20
Description : Liquefied petroleum Gas (LPG) used for the household cooking comprises mainly of (A) Propane & butane (B) Butane & ethane (C) Methane & ethane (D) Methane & carbon monoxide
Last Answer : (A) Propane & butane
Description : A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having (A) Higher ... calorific value (B) Higher carbon monoxide content (C) Lower carbon dioxide content (D) None of these
Last Answer : (A) Higher methane content and thus higher calorific value
Description : Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent. (A) < 37% (B) > 71% (C) In between 37 & 71% (D) None of these
Last Answer : (C) In between 37 & 71%
Description : While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C. (A) 1800 (B) 2000 (C) 2400 (D) 3000
Last Answer : (B) 2000
Description : Main constituents of biogas are (a) Methane and carbon monoxide (b) Butane and carbon monoxide (c) Methane and carbon dioxide (d) Ethylene and carbon dioxide
Last Answer : Ans: (c)
Description : Gobar gas contains mainly (a) Carbon dioxide (b) Methane (c) Ethylene (d) Carbon monoxide
Last Answer : Ans:(b)
Description : Marsh gas, formed from decaying organic matter and in coal mines is (a) carbon dioxide (b) methane (c) ethane (d) carbon monoxide
Description : LPG is a mixture of (a) carbon monoxide and carbon dioxide (b) butane and propane (c) methane and ethylene (d) carbon dioxide and oxygen
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.
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.
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.
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.
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%).
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.
Description : Acid rain is due to air pollution by - (1) Carbon dioxide (2) Carbon monoxide (3) Methane (4) Nitrous oxide and Sulfur dioxide
Last Answer : (4) Nitrous oxide and Sulfur dioxide Explanation: The main chemicals in air pollution that create acid rain are sulfur dioxide (SO2) and Nitrous oxide (N2O).
Description : The major harmful gas emitted by automobile vehicles which causes air pollution is – (1) Carbon Monoxide (2) Methane (3) Carbon dioxide (4) Ozone gas
Description : What is formed by the mixture of hy- drogen; methane and carbon monoxide?
Last Answer : Coal gas
Description : Major aerosol pollutant in jet plane emission is (a) sulphur dioxide (b) carbon monoxide (c) methane (d) fluorocarbon.
Last Answer : (d) fluorocarbon.
Description : Major aerosol pollutant in jet plane emission is (a) sulphur dioxide (b) carbon monoxide (c) methane (d) fluorocarbon
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 : Methane and carbon dioxide