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प्रश्न
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Electrical energy
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उत्तर
Electrical Energy:
It dissociates the reactant in molten or solution state, into ions, which are charged particles and hence respective products are obtained.
Example:
Electrolysis of acidified water.
\[\ce{2H2O ->[electric][current] 2H2 [g] + O2[g]}\]
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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 | ....................... |
Balance the following chemical equation.
\[\ce{NaCl + AgNO3 -> AgCl + NaNO3}\]
You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of:
(a) potassium chloride
(b) potassium nitride
(c) potassium sulphide
(d) potassium iodide
Balance the following equation. Also name the product formed.
PbCO3 → PbO +CO2
Write the chemical equation for the following word equation and balance them.
Carbon + Oxygen → Carbon dioxide
Name the substance that is getting oxidised in the thermit process.
Write word equation for the following molecular equation:
Na2SO3 + 2HCl [dil.] → 2NaCl + H2O + SO2 [g]
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Name the reactants and the products in the above equation.
Balance the following simple equation:
\[\ce{Ca(OH)2 + HNO3 -> Ca(NO3)2 + H2O}\]
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
PbO2 +4HCl → PbCl2 + H2O + Cl2
