The organic material of biological origin that is ultimately derived from the fixation of carbon dioxide by trapping solar energy during photosynthesis is called:
A) Biomass
B) Biofuel
C) Both A and B
D) Pyramid
1 Answers
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Statement I : When carbon dioxide passes through lime water it will turn into milky. Statement II : When excess of carbon dioxide
A) Both statements are true
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…………… named the compounds derived from living organisms as organic compound
B) Berzelius
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There are 3 isotopes of carbon. Carbon-12, Carbon-13 and Carbon-14. The most abundant carbon isotope is carbon – 12.
Correct option is A) 12.01
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Who discovered the Carbon fixation pathway? How was the pathway studied?
1. The path of carbon fixation in dark reaction through intermediate compounds leading to the formation of sugar and starch was discovered by Calvin, Benson and their co-workers discovered the...
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How was the carbon fixation pathway studied?
1. Path of carbon was studied with the help of radioactive tracer technique using Chlorella, a unicellular green alga and radioactive 14CO2 . 2. With the help of radioactive carbon, it...
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When KMnO4 acts as an oxidising agent and ultimately forms , MnO2, Mn2O3 and Mn^2+, then the number of electrons transferred
Correct option is: (C) 1, 3, 4, 5
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1. (a) Is ammonia more dense or less dense than air? (b) What property of ammonia is demonstrated by the Fountain Experiment? (c) Write the balanced equation for the reaction between ammonia and sulphuric acid. 2. Pick the odd member from the list giving reasons: (a) Ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide. (b) Copper oxide, aluminium oxide, sodium oxide, magnesium oxide. 3. Give reasons for the following : (a) Liquid ammonia is used as a refrigerant in ice plants. (b) Aqueous solution of ammonia is used for removing grease stains from woollen clothes. (c) Aqueous solution of ammonia gives a pungent smell. (d) Aqueous solution of ammonia conducts electricity.
(1) (a) ammonia is less dense than air (b) solubility in water (c) 2NH3 + H2SO4 → (NH4)2SO4 (2) (a) Ammonia → because - NH3 is basic while, SO2,HCl and CO2 are acidic oxides. (b) CuO,...
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Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?
CO combines with haemoglobin to forms a complex entity, carboxyhaemoglobin which is about 300 times more stable than oxyhaemoglobin. In blood, when the concentration of carboxyhaemoglobin reaches 3 -4%, the oxygen-carrying...
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A sample of pure carbon dioxide, irrespective of its source contains `27.27%` carbon and `72.73%` oxygen. The data support
Correct Answer - A Law of constant proportions
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Most organisms cannot use the free form of (a) Oxygen (b) Nitrogen (c) Carbon dioxide (d) Carbon monoxide
Correct option is: (b) Nitrogen
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