Advertisements
Advertisements
प्रश्न
Balance the following chemical equation:
\[\ce{FeSO4 ->[Heat] Fe2O3 + SO2 + SO3}\]
Advertisements
उत्तर
\[\ce{2FeSO4 ->[Heat][Decomposition] Fe2O3 + SO2 + SO3}\]
APPEARS IN
संबंधित प्रश्न
Methyl orange is used as an indicator. It shows colour change in acid, base and neutral substance. Tabulate your result as follows:
| Indicator | Colour change | Inference |
| Methyl Orange | No change | ...................... |
| .................... | Acid | |
| Yellow | ....................... |
Why should a magnesium ribbon be cleaned before it is burnt in the air?
Write the balanced chemical equation for the following reaction.
\[\ce{Zinc + Silver nitrate -> Zinc nitrate + Silver}\]
Giving examples, state the difference between balanced and unbalanced chemical equations.
When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.
- What do you think substance X is likely to be?
- Name the substance which the yellow solid consists of.
- Which characteristic of chemical reactions is illustrated by this example?
- Write a balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactants and products involved in the chemical equation.
When water is added gradually to a white solid X, a hissing sound is heard and a lot of heat is produced forming a product Y. A suspension of Y in water is applied to the walls of a house during white washing. A clear solution of Y is also used for testing carbon dioxide gas in the laboratory.
- What could be solid X? Write its chemical formula.
- What could be product Y? Write its chemical formula.
- What is the common name of the solution of Y which is used for testing carbon dioxide gas?
- Write chemical equation of the reaction which takes place on adding water to solid X.
- Which characteristic of chemical reactions is illustrated by this example?
Write word equation for the following skeletal equation:
\[\ce{KClO3 -> KCl + O2}\]
In electrolysis of water, why is the volume of gas collected over one electrode double that of gas collected over the other electrode?
Balance the equation stepwise.
H2S2O7(l) + H2O(l) → H2SO4(l)
State the information conveyed by the following equation:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2 ↑
Balance the following equation:
KOH + Cl2 → KCl + KClO + H2O
Write the balanced chemical equation of the following reaction.
iron pyrites(FeS2) + oxygen → ferric oxide + sulphur dioxide
Write the balanced chemical equation of the following reaction.
potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.
When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.
Write the balanced chemical equation for this reaction.
Write word equation for the following molecular equation:
\[\ce{CuSO4 + 2NaOH -> Na2SO4 + Cu(OH)2↓}\]
Word equation:
State the colour of the products.
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
2H2 + O2 → 2H2O
Balance the following simple equation:
Ca + H2O → Ca(OH)2 + H2
Balance the following simple equation:
H2 + O2 → H2O
Write the skeleton equation for the following word equation and then balance them.
- Carbon + Oxygen → Carbon dioxide.
- Phosphorus + Chlorine → Phosphorus pentachloride.
- Sulphur + Oxygen → Sulphur dioxide.
- Magnesium + hydrogen → Magnesium + Hydrogen chloride chloride.
