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प्रश्न
Balance the following equation :
Fe + O2 → Fe3 O4
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उत्तर
3Fe + 2O2 → Fe3O4
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संबंधित प्रश्न
What is a chemical equation? Explain with the help of an example.
Giving examples, state the difference between balanced and unbalanced chemical equations.
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
Balance the equation stepwise.
NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + H2O(l)
Write the chemical equation for the following word equation and balance them.
Carbon + Oxygen → Carbon dioxide
Write the chemical equation for the following word equation and balance them.
Nitrogen + Oxygen → Nitrogen monoxide
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of salt formed.
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 |
Balance the following simple equation:
CO2 + C → CO
Why should a magnesium ribbon be cleaned before burning in air?
