हिंदी

Give one example of an exothermic reaction.

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प्रश्न

Give one example of an exothermic reaction.

अति संक्षिप्त उत्तर
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उत्तर

When carbon burns in oxygen to form carbon dioxide, a large amount of heat is released.

\[\ce{\underset{Carbon}{C_{(s)}} + \underset{Oxygen}{O2_{(g)}} -> \underset{Carbon dioxide}{CO2_{(g)}} + Heat}\]

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अध्याय 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ ३१]

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लखमीर सिंग Chemistry [English] Class 10
अध्याय 1 Chemical Reactions and Equations
Exercise 1 | Q 35. (b) (i) | पृष्ठ ३१

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संबंधित प्रश्न

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\[\ce{Aluminium + Copper chloride -> Aluminium chloride + Copper}\]


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Give one example of an endothermic reaction.


When metal X is treated with a dilute acid Y, then a gas Z is evolved which burns readily by making a little explosion.
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(b) Name any two acids which can behave like acid Y.
(c) Name the gas Z.
(d) Is the gas Z lighter than or heavier than air?
(e) Is the reaction between metal X and dilute acid Y, exothermic or endothermic?
(f) By taking a specific example of metal X and dilute acid Y, write a balanced chemical equation for the reaction which takes place. Also indicate physical states of all the reactants and products.


When a mixture of gases X and Y is compressed to 300 atm pressure and then passed over a catalyst consisting of a mixture of zinc oxide and chromium oxide (heated to a temperature of 300°C), then an organic compounds Z having the molecular formula CH4O is formed. X is a highly poisonous gas which is formed in appreciable amounts when a fuel burns in a limited supply of air; Y is a gas which can be made by the action of a dilute acid on an active metal; and Z is a liquid organic compound which can react with sodium metal to produce hydrogen gas.
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(b) Write a balanced chemical equation of the reaction which takes place when X and Y combine to form Z. Indicate the conditions under which the reaction occurs.


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\[\ce{Na + O2 ->  Na2O}\]


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K2O + H2O    → KOH 


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ZnS   +   O2  →  ZnO + SO2 


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\[\ce{Ca(OH)2 + HNO3 -> Ca(NO3)2 + H2O}\]


Balance the following simple equation:

CaO  +  HCl  →  CaCl2  +  H2


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6NaOH + 3Cl2 → 6NaCl + NaClO3 + 3H2O


The chemical equation Na2SO4(aq) + BaCl2(aq) → BaSO4(s)↓ + 2NaCl(aq) represents which of the following types of reaction?


What is a product in a chemical equation?


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