Description : Which one of the following is not a gaseous biogeochemical cycle in ecosystem? (a) Sulphur cycle (b) Phosphorus cycle (c) Nitrogen cycle (d) Carbon cycle
Last Answer : b) Phosphorus cycle
Description : Which of the following pairs is a sedimentary type of biogeochemical cycle? (a) Phosphorus and nitrogen (b) Phosphorus and sulphur (c) Oxygen and nitrogen (d) Phosphorus and carbon dioxide
Last Answer : (b) Phosphorus and sulphur
Description : In which of the following both pairs have correct combination? (a) Gaseous nutrient cycle, Sedimentary nutrient cycle Nitrogen and Sulphur, Carbon and Phosphorus (b) Gaseous nutrient cycle ... (d) Gaseous nutrient cycle, Sedimentary nutrient cycle Carbon and Sulphur, Nitrogen and Phosphorus
Last Answer : (c) Gaseous nutrient cycle, Sedimentary nutrient cycle Carbon and Nitrogen, Sulphur and Phosphorus
Description : Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
Last Answer : Which one of the following is not a gaseous biogeochemical cycle in ecosystem? A. Phosphorus cycle B. Nitrogen cycle C. Carbon cycle D. Sulfur cycle
Description : Biogeochemical cycle having a small gaseous component is found in
Last Answer : Biogeochemical cycle having a small gaseous component is found in A. Phosphorus B. Nitrogen C. Carbon D. Sulfur
Description : Acid rain is caused due to pollution of atmosphere by – (1) oxides of carbon and nitrogen (2) oxides of nitrogen and sulphur (3) oxides of nitrogen and phosphorus (4) None of these
Last Answer : (2) oxides of nitrogen and sulphur Explanation: Acid rain is caused by emissions of Sulpfur Dioxide (SO2) and Nitrogen Oxide (NOx), which react with the water molecules in the atmosphere to produce acids.
Description : About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and (a) sulphur and magnesium (b) magnesium and sodium (c) calcium and phosphorus (d) phosphorus and sulphur.
Last Answer : (d) phosphorus and sulphur.
Description : Which of the following is not a gaseous air pollutant? (1) Oxides of nitrogen (2) Hydrocarbon (3) Smoke (4) Oxides of sulphur
Last Answer : (2) Hydrocarbon Explanation: The gaseous air pollutants of primary concern in urban settings include sulfur dioxide, nitrogen dioxide, and carbon monoxide; these are emitted directly into the air ... is also a pollutant. Hydrocarbon is an organic compound consisting entirely of hydrogen and carbon.
Last Answer : Hydrocarbon
Description : The element which is required by the plant in large quantity – (1) Calcium (2) Nitrogen (3) Phosphorus (4) Sulphur
Last Answer : (2) Nitrogen Explanation: All plants need nitrogen to make amino acids, proteins and DNA, but the nitrogen in the atmosphere is not in a form that they can use. Plants use nitrogen by absorbing either nitrate or ammonium through the roots.
Description : The element absorbed both in cation and anion form is – (1) Sulphur (2) Nitrogen (3) Calcium (4) Phosphorus
Last Answer : (2) Nitrogen Explanation: Nitrogen, required in large quantities for healthy plant growth, is supplied either as a cation (ammonium) or an anion (nitrate). The ratio of these two forms of nitrogen in the nutrient solution can have large effects on both the rate and direction of pH changes with time.
Description : It is a secondary plant nutrient? A. Nitrogen B. Phosphorus C. Sulphur (Answer) D. none
Last Answer : C. Sulphur (Answer)
Description : Red soil is poor in which of the following nutrients ? (A) Phosphorus and Sulphur (B) Phosphorus and Nitrogen (C) Nitrogen and Zinc (D) Nitrogen and Potassium
Last Answer : (D) Nitrogen and Potassium
Description : Macromolecule chitin is (a) sulphur containing polysaccharide (b) simple polysaccharide (c) nitrogen containing polysaccharide (d) phosphorus containing polysaccharide.
Last Answer : (c) nitrogen containing polysaccharide
Description : The element which is required by the plant in large quantity : (1) Calcium (2) Nitrogen (3) Phosphorus(4) Sulphur
Last Answer : Nitrogen
Description : The element absorbed both in cation and anion form is (1) Sulphur (2) Nitrogen (3) Calcium (4) Phosphorus
Description : Are reservoirs that chemical elements can move through as part of the Earth's biogeochemical cycle I.the solid Earth II.Earth's oceans III.Earth's atmosphere IV.organisms on Earth?
Last Answer : Need answer
Description : Presence of __________ in a dry gaseous fuel does not contribute to its calorific value. (A) Sulphur (B) Oxygen (C) Hydrogen (D) Carbon
Last Answer : (B) Oxygen
Description : A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the (A) Presence of large ... fuel (C) High sulphur content in the fuel (D) Lack of thorough mixing of fuel with air
Last Answer : (D) Lack of thorough mixing of fuel with air
Description : In vulcanization, natural rubber is heated with- (1) Carbon (2) Sulphur (3) Silicon (4) Phosphorus
Last Answer : (2) Sulphur Explanation: Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur, which results in three-dimensional crosslinking of the chain rubber molecules (polyisoprene) bonded to each other by sulfur atoms.
Description : Which of the following is used in making smoke bombs? (1) Sulphur (2) Phosphorus (3) Hydrogen (4) Carbon
Last Answer : (4) Carbon Explanation: A smoke bomb is a firework designed to produce smoke upon ignition. Smoke bombs are useful to military units, airsoft games, paintball games, self-defense and pranks. The ... -style fireworks and later modified the formula to produce more smoke for a longer period of time.
Description : Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its (A) Corrosion resistance (B) Tensile strength (C) Machinability (D) Compressive strength
Last Answer : (C) Machinability
Description : Brittleness of cold is due to an excess of (A) Sulphur (B) Carbon (C) Phosphorus (D) Silicon
Last Answer : Answer: Option C
Description : Red short iron cracks when bent due to the presence of (A) Sulphur (B) Carbon (C) Phosphorus (D) Silicon
Last Answer : Answer: Option A
Description : Vulcanization of rubber is carried out by adding (1) Sulphur (2) Carbon (3) Ozone (4) Phosphorus
Last Answer : Sulphur
Last Answer : Carbon
Description : Which of the following elements is not present in a nitrogenous base? (a) Hydrogen (b) Carbon (c) Phosphorus (d) Nitrogen
Last Answer : (c) Phosphorus
Description : Which of the following elements is essential for the storage of energy in plants? a. Nitrogen b. Oxygen c. Carbon d. Phosphorus
Last Answer : d. Phosphorus
Description : Which of the following groups of elements have an OUTER ELECTRONIC configuration of S-2-P-2? w) halogens x) Nitrogen-Phosphorus Group y) Carbon-Silicon Group z) Boron-Aluminum Group
Last Answer : ANSWER: Y -- CARBON-SILICON GROUP
Description : In an ecosystem, which one shows one-way passage? (a) Free energy (b) Carbon (c) Nitrogen (d) Potassium
Last Answer : (a) Free energy
Description : Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.
Last Answer : Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A- ... fall","Rock minerals","Detritus"):}`
Description : Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks. Consumers A D C Uptake Run off Soil solution B A B ... minerals Detritus (c) Detritus Rock minerals Producers Litter fall (d) Producers Litter fall Rock minerals Detritus
Last Answer : (c) Detritus Rock minerals Producers Litter fall
Description : The optimum percentage of excess air for combustion depends upon the__________ of the fuel. (A) Type (solid, liquid or gaseous) (B) Calorific value (C) Sulphur content (D) Ignition temperature
Last Answer : (A) Type (solid, liquid or gaseous)
Description : In the synthesis of cell components the major element required is a. Nitrogen b. Sulphur c. Carbon d. Oxygen
Last Answer : Ans: C
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)
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)
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.
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.
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
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
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.
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.
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.
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).
Description : Burning pyrites ore gives out – (1) Carbon dioxide gas (2) Sulphur dioxide gas (3) Nitrogen dioxide gas (4) Nitric oxide gas
Last Answer : (2) Sulphur dioxide gas Explanation: The mineral pyrite, or iron pyrite, is an iron sulfide with the formula FeS9. Pyrite remains in commercial use for the production of sulfur dioxide, for use in such applications as the paper industry, and in the manufacture of sulfuric acid.
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 : Which gas emitted by power stations causes acid rain? (1) Carbon dioxide (2) Sulphur dioxide (3) Helium (4) Nitrogen
Last Answer : (2) Sulphur dioxide Explanation: Sulfur dioxide (SO2) and nitrogen oxides (NOx) are the principal pollutants that cause acid rain. SO2 and NOx emissions released to the air react with water vapor ... Earth. Power plants burning coal and heavy oil produce over two-thirds of the annual SO2 emission.
Description : Global warming is mainly due to accumulation of – (1) Oxides of nitrogen (2) Oxides of sulphur (3) Carbon dioxide (4) Carbon monoxide
Last Answer : (3) Carbon dioxide Explanation: Global Warming refers to average increase in the earth's temperature due to increase in pollution which results in greenhouse effect which in turn leads to climate ... dioxide accumulate into the atmosphere and trap heat that would normally exit into the outer space.
Description : Two elements which can form a large number of compounds are (1) Carbon and Hydrogen (2) Carbon and Nitrogen (3) Carbon and Oxygen (4) Carbon and Sulphur
Last Answer : (1) Carbon and Hydrogen Explanation: The carbon-hydrogen bond (C-H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. Compound classes ... bonds are alkanes, alkenes, alkynes, and aromatic hydrocarbons. Collectively they are known as hydrocarbons.