Fusion reactions which take place at very high temperature are called

Fusion reactions which take place at very high temperature are called
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thermonuclear

fusion reactions.
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Fusion reaction takes place at high temperature because

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The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

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Coals used for the generation of producer gas should have (A) High caking index (B) Low fusion point of ash (C) High volatile matter content (D) Very low ash content (8-10%)

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The snow on the mountains does NOT melt all at once when it is heated by the sun because: (1) it becomes very hard (2) it reflects most of the heat from the sun (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

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Assign the reason for the following: (a) Enthalpy of fusion of water is higher as compared to the hydrides of Sulphur & Selenium. (b) Water is quite stable and does not dissociate in to its elements even at high temperature.

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The reason for excessive clinker formation in gas producers is the (A) Use of coal/coke containing a high % of fines and ash (B) Use of fuel having too low an ash fusion temperature (C) Development of hot spots in the fuel bed and an abnormally high rate of gasification (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

In which part of the sun does nuclear fusion take place?

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A good metallurgical coke should have very low (A) Sulphur & phosphorous content (B) Porosity (C) Fusion point of its ash (D) Hardness & strength

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The reactions of high molecularity are rare, because (A) Of very large activation energy of many bodies (B) Of low probability of many body collisions (C) Many body collisions are not favoured energetically (D) Of requirement of very large concentration for such reactions

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In autocatalytic reactions, (A) One of the reactants acts as a catalyst (B) One of the products acts as a catalyst (C) Catalysts have very high selectivity (D) No catalyst is used

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Resistance to fusion of the refractory under a steady rising temperature condition is called (A) Spalling (B) Refractoriness (C) Both (A) & (B)(D) Neither (A) nor (B)

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In producer gas making furnace, steam is added along with air to mainly control the (A) Fusion of coal ash & clinker formation (B) C. V. of producer gas (C) Temperature of producer gas (D) Tar content in producer gas

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A coal having higher volatile matter content will necessarily have lower (A) Ash fusion temperature (B) Calorific value (C) Ignition temperature (D) Caking index

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The weathering index of a coal (A) Gives an idea of the fusion temperature of ash (B) Is related to its calorific value (C) Is a measure of its size stability, when stored & exposed to weather (D) Is a measure of its caking tendency

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The heat absorbed by a unit mass of a material at its holding point in order to convert the material into a gas at the same temperature.  a. Latent Heat of Sublimation  b. Latent Heat of Vaporization  c. Latent Heat of Fusion  d. Latent Heat Of Condensation

Description : The heat absorbed by a unit mass of a material at its holding point in order to convert the material into a gas at the same temperature.  a. Latent Heat of Sublimation  b. Latent Heat of Vaporization  c. Latent Heat of Fusion  d. Latent Heat Of Condensation

Last Answer : Latent Heat of Vaporization

Heat which causes a change in temperature of a substance.  a. Latent heat  b. Sensible heat  c. Specific heat  d. Heat of Fusion

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Last Answer : Sensible heat

The ______ of a substance is the amount of heat that must be added or removed from a unit mass of the substance to change its temperature by one degree.  A. Latent heat of fusion  B. Molar heat  C. Specific heat capacity  D. Specific heat

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Last Answer : Specific heat capacity

What is defined as the energy required to raise the temperature of a unit mass of a substance by one degree?  A. Latent heat of fusion  B. Molar heat  C. Specific heat capacity  D. Specific heat

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Fusion temperature of impression compound should occur: A. Below mouth temperature B. Above mouth temperature C. As of the skin temperature D. At the room temperature E. None of the above

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Which of the following terms refer to the amount of heat needed to raise the temperature of a unit mass of a substance through one degree? w) Heat of fusion x) Liquification heat y) Internal heat z) Specific heat

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Last Answer : ANSWER: Z -- SPECIFIC HEAT

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