Description : Mineral constituent of chlorophyll is - (1) Iron (2) Magnesium (3) Calcium (4) Potassium
Last Answer : (2) Magnesium Explanation: Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesize carbohydrates from CO2 and water. This process is known as photosynthesis and is the basis for ... It is found in the chloroplasts of green plants, and is what makes green plants, green.
Description : Mineral constituent of chlorophyll is (1) Iron (2) Magnesium (3) Calcium (4) Potassium
Last Answer : Magnesium
Description : Which nutrient in fertiliser makes the plant stems stronger and increases branching? (A) Nitrogen (B) Phosphorous (C) Potassium (D) Calcium
Last Answer : (B) Phosphorous
Description : The three elements most needed in common fertilisers are : (1) Sulphur, Phosphorous and Sodium (2) Nitrogen, Potassium and Phosphorous (3) Phosphorous, Sodium and Nitrogen (4) Calcium, Phosphorous and Potassium
Last Answer : Nitrogen, Potassium and Phosphorous
Description : Which of the following non-metal reacts and catches fire on exposure to air? a) phosphorous b)nitrogen c)sulphur d)hydrogen
Last Answer : a) phosphorous
Description : Which of the following is not a component of chlorophyll? (1) Hydrogen (2) Magnesium (3) Carbon (4) Calcium
Last Answer : (4) Calcium Explanation: Chlorophyll, a photo-receptive pigment, allows plants to absorb sunlight and synthesize it into carbohydrates and oxygen. The basic formula for photosynthesis takes 6 molecules ... to and produced through the same metabolic pathway as other porphyrin pigments such as home.
Description : Which of the following is not a component of chlorophyll ? (1) Hydrogen (2) Magnesium (3) Carbon (4) Calcium
Last Answer : Calcium
Description : Reaction of Cresylic acid with __________ produces Tricresyl phosphate.. (A) Phosphorous pentoxide (B) Phosphorous oxychloride (C) Ammonium phosphate (D) Calcium phosphate
Last Answer : (B) Phosphorous oxychloride
Description : __________ is required more for leafy crops. (A) Nitrogen (B) Phosphorous (C) Potassium (D) Carbon
Last Answer : (A) Nitrogen
Description : Pick out the wrong statement. (A) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water (B) Apatite is the principal material present in ... fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound fo
Last Answer : (C) Urea is more hygroscopic than ammonium nitrate
Description : Which one of the following is not a constituent of biogas? (1) Methane (2) Carbon dioxide (3) Hydrogen (4) Nitrogen dioxide
Last Answer : (4) Nitrogen dioxide Explanation: Nitrogen dioxide is not a component of biogas. Biogas is produced under anaerobic conditions; the process is denominated as anaerobic digestion. The major constituent of biogas is methane (55-70%), CO2 (30-45%) and some traces of gases such as H2S and ammonia.
Description : The most abundant constituent of atmospheric air is – (1) carbon (2) hydrogen (3) oxygen (4) nitrogen
Last Answer : (4) nitrogen Explanation: Air is the name given to the atmosphere used in breathing and photosynthesis. Dry air contains roughly (by volume) 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.
Description : The major constituent of air is – (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen
Last Answer : (1) nitrogen Explanation: Depending on various geographical locationsthese may change, but for the most part air is made up of 78% nitrogen (N2), 21% oxygen (O2), and trace amounts of ... and mostly inert diatomic gas at standard conditions, constituting 78.09% by volume of Earth's atmosphere.
Description : The most abundant constituent of atmospheric air is : (1) carbon (2) hydrogen (3) oxygen (4) nitrogen
Last Answer : nitrogen
Description : The major constituent of air is (1) nitrogen (2) carbon dioxide (3) oxygen (4) hydrogen
Description : In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, `PCl_(5)` as well as `PCl_(5)` are possible. It is due to
Last Answer : In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, ... P in solid while N in gaseous state at room temperature
Description : In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, `PCl_(5)` are possible. It is due to
Last Answer : In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, ... In solid while N in gaseous state at room temperature.
Description : The main constituent of carborundum is __________ carbide. (A) Calcium (B) Silicon (C) Boron (D) Aluminium
Last Answer : (B) Silicon
Description : __________ is the major constituent of the Portland cement. (A) Calcium carbonate (B) Calcium oxide (C) Tricalcium silicate (D) Calcium sulphate
Last Answer : (C) Tricalcium silicate
Description : The main active constituent of tea and coffee is (a) nicotine (b) chlorophyll (c) caffeine (d) aspirin
Last Answer : Ans:(c)
Description : Magnesium is a constituent metal of – (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes
Last Answer : (1) Chlorophyll molecule Explanation: The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in ... was discovered in 1906 and was the first time that magnesium had been detected in living tissue.
Description : Magnesium is a constituent of : (A) Nucleic Acid (B) Enzyme system (C) Cell wall (D) Chlorophyll
Last Answer : (D) Chlorophyll
Description : Magnesium is a constituent metal of (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes
Last Answer : Chlorophyll molecule
Description : To carry out photosynthesis plants require – (1) Oxygen (2) Carbon-dioxide (3) Nitrogen (4) Hydrogen
Last Answer : (2) Carbon-dioxide Explanation: In photosynthesis, carbon dioxide is converted into sugars in a process called carbon fixation. Carbon fixation is a redox reaction, so photosynthesis needs to ... the electrons needed to convert carbon dioxide into a carbohydrate, which is a reduction reaction.
Description : During photosynthesis in plants, the gas evolved is - (1) Carbon dioxide (2) Nitrogen (3) Oxygen (4) Hydrogen
Last Answer : (3) Oxygen Explanation: Photosynthesis is a process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism ... , through primary production, or indirectly, as the ultimate source of the energy in their food.
Description : During photosynthesis the liberated gas is (1) Carbon dioxide (2) oxygen (3) Nitrogen (4) Hydrogen
Last Answer : (2) oxygen Explanation: Photosynthesis is a process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism ... water, releasing oxygen as a waste product.' Photosynthesis is vital for all aerobic life on Earth.
Description : Which of the following gases do plants and trees give out during photosynthesis? A. Hydrogen B. Nitrogen C. Oxygen (Answer) D. Carbon dioxide
Last Answer : C. Oxygen (Answer)
Description : To carry out photosynthesis plants require (1) Oxygen (2) Carbon-dioxide (3) Nitrogen (4) Hydrogen
Last Answer : Carbon-dioxide
Description : During photosynthesis in plants, the gas evolved is (1) Carbon dioxide (2) Nitrogen (3) Oxygen (4) Hydrogen
Last Answer : Oxygen
Description : During photosynthesis the liberated gas is : (1) Carbon dioxide (2) Oxygen (3) Nitrogen (4) Hydrogen
Description : ction of calcium Fluorapatite with sulphuric acid produces (A) Ortho-phosphoric acid (B) Simple superphosphate (C) Triple superphosphate (D) Red phosphorous
Last Answer : (B) Simple superphosphate
Description : Pick out the wrong statement. (A) All the nitrogenous fertilisers are not soluble in water (B) A straight fertiliser contains only one nutrient (C) Calcium cyanamide is used as weed killer in onion fields (D) The phosphorous nutrient makes the plant stem stronger and increases its branches
Last Answer : (A) All the nitrogenous fertilisers are not soluble in water
Description : ________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant. (A) Calcium (B) Fluorine (C) Phosphorous (D) Sulphur
Last Answer : (B) Fluorine
Description : Which of the following does not come under the category of ‘primary nutrient' for plant growth? (A) Potassium (B) Nitrogen (C) Phosphorous (D) Sulphur
Last Answer : (D) Sulphur
Description : Which of the following is not a measure component necessarily to be present in fertilisers? (A) Nitrogen (B) Potassium (C) Phosphorous (D) Sulphur
Description : Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes (A) Foaming (B) Odour nuisances (C) Undesirable plant growth (D) Turbidity
Last Answer : (C) Undesirable plant growth
Description : Silicon crystal can be converted to p-type semi-conductor by doping with (A) Phosphorous (B) Nitrogen (C) Carbon (D) Boron
Last Answer : Option D
Description : Pick out the wrong statement. (A) Cold cracking of a weld is due to the presence of hydrogen gas in the weld (B) True stress is given by, σ = σE (1 + εE), where σE and εE ... in the iron blast furnace (D) High residual stress at the surface is beneficial for fatigue properties of a material
Last Answer : Option C
Description : Apart from sunlight and chlorophyll, what other things are required to make food by photosynthesis ? -Science
Last Answer : Carbon dioxide and water.
Description : The wavelength of light most absorbed by chlorophyll-a during photosynthesis is
Last Answer : The wavelength of light most absorbed by chlorophyll-a during photosynthesis is A. 460 nm B. 500 nm C. 600 nm D. 660 nm
Last Answer : The wavelength of light most absorbed by chlorophyll-a during photosynthesis is A. 400 nm B. 550 nm C. 660 nm D. 700 nm
Description : $ Nostoc has chloropyll "a" and phycocyanin pigments. ! Chlorophyll "a" helps in oxygenic photosynthesis.
Last Answer : $ Nostoc has chloropyll "a" and phycocyanin pigments. ! Chlorophyll "a" helps in oxygenic photosynthesis. A. ... wrong D. If both As and R are wrong.
Description : In photosynthesis is chlorophyll considered a reactant a product neither how does the role of chlorophyll compare with the roles of co2 and h20?
Last Answer : Need answer
Description : Chlorophyll is essential to photosynthesis because it traps the needed?
Last Answer : Chlorophyll traps the light energy from the sun
Description : Moll’s experiment explains that (a) Carbon dioxide is essential for photosynthesis (b) Chlorophyll and water are necessary for photosynthesis (c) Light and water are essential for photosynthesis (d) All of the above are correct
Last Answer : Ans. ((a))
Description : Which cell organelle is the site of photosynthesis and also contains chlorophyll? (1) chloroplasts (2) vacuole (3) cytoplasm (4) nucleolus
Last Answer : (1) chloroplasts Explanation: Chloroplast, found in plant cells, is the site of photosynthesis in plants to prepare food (glucose) for the plant with the use of energy. It is a green ... a and b that absorb visible light energy and convert it to usable chemical energy in photosynthesis.
Description : The liberation of oxygen during photosynthesis is due to - (1) hydrolysis of carbohydrates (2) photolysis of water (3) reduction of CO2 (4) breakdown of chlorophyll
Last Answer : (2) photolysis of water Explanation: In the process of photosynthesis, oxygen is produced from the photolysis of water. The photolysis of water occurs when light is used to renew split water and ... , also referred to as ATP. The hydrogen remains in the leaf and participates in further reactions.
Description : Which of the following provides energy for photosynthesis? (1) Water (2) Sunlight (3) Chlorophyll (4) Carbon dioxide
Last Answer : (2) Sunlight Explanation: Photosynthesis is a process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the ... is therefore: Carbon dioxide + electron donor + light energy -4 carbohydrate + oxidized electron donor.
Description : The source of oxygen generated during photosynthesis is: (1) water (2) carbon dioxide (3) chlorophyll (4) mesophyll cells
Last Answer : (1) water Explanation: The source of oxygen produced during photosynthesis is the splitting of water molecule into hydrogen and oxygen. Photosynthesis uses carbon dioxide and water, releasing ... inside organelles called chloroplasts, while in bacteria they are embedded in the plasma membrane.