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प्रश्न
Write your observation for the following chemical reaction and name the product formed:
When sugar is heated.
उत्तर
When sugar is heated, a black solid mass (charcoal) is formed along with water vapours.
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संबंधित प्रश्न
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are compounds.
Aluminium burns in chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reaction.
Potassium chlorate (KClO3) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction and indicate the evolution of gas.
What happens when silver nitrate solution is added to sodium chloride solution?
Write the equation for the reaction which takes place.
State the information conveyed by the following equation:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2 ↑
Balance the following equation:
Pb3O4 + HCl → PbCl2 + H2O + Cl2
Answer the following question:
1 g of copper powder was taken in a China dish and heated. What change takes place on heating? When hydrogen gas is passed over this heated substance, a visible change is seen in it. Give the chemical equations of reactions, the name and the color of the products formed in each case.
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Heat energy
Balance the following simple equation:
Zn + NaOH → Na2ZnO2 + H2
Dil. HCl is added to Zn granules. How will you prove that chemical change has taken place here? Support your response with two arguments.
