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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
Translate the following statement into a chemical equation and then balance it.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
Write a complete balanced equation for the following reaction:
\[\ce{Calcium (solid) + Water (liquid) -> Calcium hydroxide (solution) + Hydrogen (gas)}\]
Balance the following equation:
\[\ce{Fe + O2 -> Fe2O3}\]
Balance the following equation:
\[\ce{NH3 + CuO -> Cu + N2 + H2O}\]
Balance the following equation:
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Write a balanced chemical equation from the following information:
An aqueous calcium hydroxide solution (lime water) reacts with carbon dioxide gas to produce a solid calcium carbonate precipitate and water.
Balance the following equation and add state symbols:
\[\ce{Zn + HCl -> ZnCl2 + H2}\]
Balance the following chemical equation:
\[\ce{MnO2 + HCl -> MnCl2 + Cl2 + H2O}\]
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.
State one characteristic of the chemical reaction which takes place when quicklime is treated with water
Give one example of an exothermic reaction.
You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of ______.
Which of the following is not an endothermic reaction?
The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
- What is metal M?
- What is solution S? Is it acidic or alkaline?
- What is gas G?
- Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
- Is this reaction exothermic or endothermic?
What happens when silver nitrate solution is added to sodium chloride solution?
- Write the equation for the reaction which takes place.
- Name the type of reaction involved.
A white precipitate will be formed if we add common salt solution to ______.
Why do we need to balance chemical equations?
Write word equation for the following skeletal equation:
\[\ce{Na + O2 -> Na2O}\]
Balance the following equation. Also name the product formed.
`"KCIO"_3 → "KCI" +"O"_2`
Balance the following equation. Also name the product formed.
`"Na"+ "H"_2 "O" → "NaOH"+ "H"_2`
Write your observation and name the product when An aqueous solution of barium chloride is added to dilute sulphuric acid.
In the experiment for determining the percentage of water absorbed by raisins, we do the final weighing of the raisins after keeping them dipped in water for about one hour. For the accuracy of the result, the extra water from the surface of the soaked raisins is removed by
What is a chemical equation? Why it is necessary to balance it?
Balance the following equation:
Zn + HNO3 `→` Zn(NO3)2 + H2O + NO2
Write the balanced chemical equation of the following reaction. iron + sulphuric acid → ferrous sulphate + hydrogen.
Write the balanced chemical equation of the following reaction.
sodium chloride + manganese dioxide + sulphuric acid → sodium hydrogen sulphate + manganese sulphate + water + chlorine.
Complete the following blank in the equation as indicated.
\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Moles: 1 mole + ______ `→` ______ + ______
Write word equation for the following molecular equation:
CaO + H20 → Ca (OH)2 + Δ
Word equation:
State why [+ Δ ] is not written in the reaction, if ZnO reacts with H2O.
Give word equation for the following chemical reaction and give the names of the product formed.
Zn + 2HC1→ ZnCl2 + H2
Give word equation for the following chemical reaction and give the names of the product formed.
Zn + S → ZnS
Write word equation for the following chemical reaction given below. Also state the observation seen in the case.
\[\ce{ZnCo3->[\triangle] ZnO + CO2}\]
Explain the term ‘chemical equation’.
Give an example of a chemical equation in which two reactants form:
one product
Give an example of a chemical equation in which two reactants form:
four product
Balance the following simple equation:
SO2 + O2 ⇌ SO3
Balance the following simple equation:
Zn + HCl → ZnCl2 + H2
Write a balanced equation for the following word equation:
Potassium bromide + Chlorine → Potassium chloride + Bromine
Which of the following is not a physical change?
Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is(are) correct?
- In beakers A and B, exothermic process has occurred.
- In beakers A and B, endothermic process has occurred.
- In beaker C exothermic process has occurred.
- In beaker C endothermic process has occurred.
