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प्रश्न
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Catalyst
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उत्तर
Catalyst:
It is a substance which alters the rate of the reaction [i.e. increases or decreases the rate] without taking part in the reaction.It itself remains chemically unchanged at the end of the reaction.
Example: Catalytic oxidation of ammonia – using catalyst platinum
\[\ce{4NH3 + 5O2 ->[Pt][800°C] 4NO + 6H2O + \triangle}\]
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संबंधित प्रश्न
Complete and balance the following equation:
NaOH + .......... \[\ce{-> Na2SO4 + H2O}\]
With the help of an appropriate example, justify that some of the chemical reactions are determined by the evolution of a gas.
Give a chemical equation for the reaction involved in the above case.
Write word equation for the following skeletal equation:
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Write symbolic representation for the following word equation and balance them :
Aluminium + Chlorine → Aluminium chloride.
Balance the following equation. Also name the product formed.
PbCO3 → PbO +CO2
Write the balanced chemical equation of the following reaction.
potassium dichromate + hydrochloric acid → Potassium chloride + chromium chloride + water + chlorine
Answer the following question:
How do acids and bases react with each other? What is the name of the process? What product is obtained from these reactions?
Explain the term ‘chemical equation’.
Balance the following simple equation:
Mg + N2 → Mg3N2
Balance the following simple equation:
Al + H2SO4 → Al2(SO4)3 + H2
