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प्रश्न
With the help of an appropriate example, justify that some of the chemical reactions are determined by Change in temperature.
Give chemical equation for the reaction involved in the above case.
Give one example of a chemical reaction characterised by change in temperature.
उत्तर
When quicklime reacts with water, slaked lime is formed with a release of large amount of heat, causing change in temperature in the reaction mixture.
\[\ce{CaO + H2O->Ca(OH)2 + Heat}\]
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संबंधित प्रश्न
Write any two observations in an activity which may suggest that a chemical reaction has taken place. Give an example in support of your answer.
Which of the following is not an endothermic reaction?
(a) CaCO3 → CaO + CO2
(b) 2H2O →2H2 + O2
(c) 6CO2 + 6H2O → C6H12O6 + 6O2
(d) C6H12O6 + 6O2 → 6CO2 + 6H2O
Complete the following equation:
CH2 + H5OH `("Hot Conc." H_2SO_4)/`>
To determine the percentage of water absorbed by raisins, raisins are soaked in water for:
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate mass of MnO2 used.
What is meant by ‘reactants’ and ‘products’ in a chemical equation?
Balance the following simple equation:
N2 + O2 ⇌ NO
Balance the following simple equation:
ZnS + O2 → ZnO + SO2
Balance the following simple equation:
\[\ce{N2 + H2 <=> NH3}\]
Write a balanced equation for the following word equation:
Aluminium + Oxygen → Aluminium oxide
