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प्रश्न
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Iron [II] sulphate to sodium hydroxide.
उत्तर
Iron [II] sulphate and sodium hydroxide
\[\ce{FeSO4 + 2NaOH -> Na2SO4 + \underset{\text{Iron[II] hydroxide}}{Fe(OH)2↓}}\]
The precipitate formed is Iron [II] hydroxide which is dirty green in colour.
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संबंधित प्रश्न
Translate the following statement into chemical equation and then balance the equation:
Aluminium metal replaces iron from ferric oxide, Fe2O3, giving aluminium oxide and iron.
Balance the given equation:
Fe + O2 
Fe2O3
Express the following facts in the form of a balanced chemical equation:
"When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed".
Why should an equation be balanced? Explain with the help of a simple 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:
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.
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
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Name the reactants and the products in the above equation.
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\[\ce{2SO2 + O2 ⇌[V2O5][450°C] 2SO3}\]
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KHCO3 → K2CO3 + H2O + CO2
Balance the following simple equation:
NaOH + Cl2 → NaCl + NaClO + H2O
