Which of the following is not a chemical reaction'? (1) Burning of paper (2) Digestion ot" food (3) Conversion of water into steam (4) Burning of coal

Which of the following is not a chemical reaction'? (1) Burning of paper (2) Digestion ot" food (3) Conversion of water into steam (4) Burning of coal
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Conversion of water into steam
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Which of the following is not a chemical reaction? (1) Burning of paper (2) Digestion of food (3) Conversion of water into steam (4) Burning of coal

Description : Which of the following is not a chemical reaction? (1) Burning of paper (2) Digestion of food (3) Conversion of water into steam (4) Burning of coal

Last Answer : (3) Conversion of water into steam Explanation: Water boiling is a physical reaction only because during physical reaction there is a change of state but during chemical reaction there is breaking or making of bonds.

Which of the following is not a chemical reaction'? (1) Burning of paper (2) Digestion of food (3) Conversion of water into steam (4) Burning of coal

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Last Answer : (3) Conversion of water into steam Explanation: The conversion of water into steam is an example of a physical change. where the state of the matter changes without changing its composition. A ... of durability, changes to crystal form, textural change, shape, size, color, volume and density.

Which of the following is not a chemical action? (a) Burning of coal (b) Conversion of water into steam (c) Digestion of food (d) Burning of paper

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Last Answer : Ans:(b)

For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the (A) Steam to ethylene ratio (B) Temperature (C) Pressure (D) None of these

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In hydel power station, the motion produced in turbines is due to (1) flow of water (2) burning of coal (3) burning of diesel (4) production of steam

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Last Answer : (1) tendency of carbon dioxide to form a layer along with dust smoke Explanation: Burning coal requires oxygen to chemically react. The availability of oxygen is limited in the furnace by several factors ... dioxide from forming layer along with dust smoke so as to keep the supply of oxygen intact.

The open "Sigrees" or coal stoves often require fanning to sustain burning because of (1) tendency of carbon dioxide to form a layer along with dust smoke (2) lack of oxygen in the surroundings of sigrees (3) accumulation of smoke and dust over the sigrees (4) interrupted release of moisture from the material

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