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प्रश्न
Write the balanced chemical equation of the following reaction.
iron pyrites(FeS2) + oxygen → ferric oxide + sulphur dioxide
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उत्तर
4FeS2 + 11O2 → 2Fe2O3 + 8SO2
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संबंधित प्रश्न
What is a chemical equation? Explain with the help of an example.
Convey the following information in the form of a balanced chemical equation:
“An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution.”
One of the following does not happen during a chemical reaction. This is:
Balance the following equation. Also name the product formed.
K2O + H2O → KOH
Name the fundamental law that is involved in every equation.
Match column A with column B.
| Column A | Column B |
| (a) Blue salt changes to white and then black | (i) Ammonium dichromate |
| (b) Orange coloured compound changes to green. | (ii) Iodine |
| (c) Red compound changes to brown and then yellow. | (iii) Zinc Nitrate |
| (d) White to yellow when hot and white when cold. | (iv) Copper sulphate |
| (e) Violet solid changes to violet vapours. | (v) Red Lead |
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?
A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – zinc carbonate.
Balance the following simple equation:
Fe + Cl2 → FeCl3
Balance the following simple equation:
Zn + NaOH → Na2ZnO2 + H2
