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प्रश्न
Write an Explanation.
Balanced equations
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उत्तर
A balanced equation is a symbolic representation of a chemical reaction where the number of atoms for each element is identical on both the reactant (left) and product (right) sides.
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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 | ....................... |
Translate the following statement into a chemical equation and then balance it.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
What is a chemical equation? Explain with the help of an example.
With the help of an appropriate example, justify that some of the chemical reactions are determined by a change in colour.
Give a chemical equation for the reaction involved in the above case.
With the help of an appropriate example, justify that some of the chemical reactions are determined by a change in temperature.
Give a chemical equation for the reaction involved in the above case.
Write word equation for the following skeletal equation:
\[\ce{FeCl2 + Cl2 -> FeCl3}\]
Write your observation for the following chemical reaction and name the product formed :
When ammonium chloride is heated with sodium hydroxide.
Write the chemical equation for the following word equation and balance them.
Sodium reacts with water to form sodium hydroxide and hydrogen
Balance the following equation:
\[\ce{S + HNO3 -> H2SO4 + NO2 + H2O}\]
Write the balanced chemical equation of the following reaction. iron + sulphuric acid → ferrous sulphate + hydrogen.
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of chlorine gas formed.
Considering the relationship in the first pair, complete the second paie :
AgCI : White :: CuI2 : ___________
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.
\[\ce{2H2O ->[electric][current] 2H2 + O2}\]
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Heat energy
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Pressure
Name the following:
The gas evolved when a dilute acid is added to chalk [limestone].
Balance the following simple equation:
N2 + O2 ⇌ NO
Balance the following simple equation:
K + CO2 → K2O + C
Complete the given chemical reaction.
\[\ce{CuSO_{4(aq)} + Fe_{(s)} ->}\]______ + ______
Which of the following is the correct observation of the reaction shown in the above set up?
