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siddharth mishra (siddharth) (
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Q. why are certain reactions exothermic,while some are endothermic explain taking help of bond energy ...
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1 answer under Chemical Reactions and... 2 years ago

A. Understand Exothermic reactions in this simple way, 1)Bonds are formed between atoms to become stable. 2)The species which has more energy is less stable. 3)So when two species form a... link
2 years ago
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Q. give an example of combination reaction giving three reactants and one product ...
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1 answer under Combination Reaction 2 years ago

A. Group 2(Alkaline Earth Metals) Metal Carbonates dissolve in water in presence of Carbon dioxide: MgCO3(s) + CO2(g) + H2O(l) = Mg(HCO3)2(aq) (Magnesium bicarbonate) (soluble) Note that these... link
2 years ago
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Q. butane burns in air to give carbon dioxide and water vapour and heat write a chemical equation and balance it it will be exothermic or ...
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1 answer under Chemical Reactions and... 2 years ago

A. The answer lies in the question itself: You say that it will release heat(isn't that what the definition of exothermic reactions tell us), hence, it'll definitely be exothermic in nature. As far... link
2 years ago
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Q. the resistance of a metal wire of length 1 metre is 26 ohm at 20 degree celsius if the diameter of the wire 0.3mm ...
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3 answers under Electricity 2 years ago

A. we know from the extension of Ohm's law: R = ρl/A [R= 26Ω; l = 1m; diameter = 0.3mm, hence radius = 0.15mm, or, 0.15*10^(-3)m] putting this value in the relation, and finding out the value... link
2 years ago
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Q. in the refining of silver the recovery of silver from AgNo3 solution involved displacement by copper metal write down the reaction envolved ...
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1 answer under Chemical Equations 2 years ago

A. Its a simple case of displacement reaction/ precipitation reaction, Here, the more electro-positive Cu, displaces lesser electro-positive Ag. Cu(aq) + 2AgNO3(aq) = 2Ag(s)↓(black) + Cu(NO3)2(aq) link
2 years ago
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Q. the boiling occurs when the pressure exerted by by vapour of liquid becomes equal to extenal or atmospheric pressure explain in detail ...
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1 answer under Matter In Our... 2 years ago

A. A liquid can only boil when it reaches a saturation energy level. After this, it cannot contain this energy, and so, it starts to change its phase so as to accommodate this extra energy. Now, its... link
2 years ago
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