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प्रश्न
What is meant by chemical reaction? Explain with the help of an example.
उत्तर
Chemical reaction is the process in which atoms of some elements rearrange—that is, undergo a chemical change—to form a new product with different properties. This involves breaking of old bonds between the reacting atoms and making of new chemical bonds between the rearranged atoms.
For example, the burning of magnesium ribbon in air. In this reaction, magnesium ribbon, on heating, combines with oxygen to form a white powder of magnesium oxide, which is totally different in its properties from magnesium and oxygen.
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संबंधित प्रश्न
On what basis is a chemical equation balanced?
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
Balance the following chemical equation :
FeS + HCl → FeCl2 + H2S
What is the limitation of the reaction given in question 2?
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NH3 + HCl ⇌ NH4Cl
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Iron [III] chloride to ammonium hydroxide.
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For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Write the word equation for the above molecular equation.
Balance the following simple equation:
SO2 + O2 ⇌ SO3
