मराठी

State whether the following statement is true or false: A chemical equation can be balanced easily by altering the formula of a reactant or product.

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प्रश्न

State whether the following statement is true or false:

A chemical equation can be balanced easily by altering the formula of a reactant or product.

चूक किंवा बरोबर
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उत्तर

This statement is false.

Explanation:

In a chemical equation, the numbers preceding the compounds are called stoichiometric coefficients. The coefficients must be altered to achieve a balanced chemical equation. A chemical reaction is balanced by altering the stoichiometric coefficients rather than modifying the formulas of the reactants or products.

\[\ce{CH4 + 4Cl2 ->CCl4 + 4HCl}\]

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पाठ 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ २८]

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लखमीर सिंह Chemistry [English] Class 10
पाठ 1 Chemical Reactions and Equations
Exercise 1 | Q 5. | पृष्ठ २८

व्हिडिओ ट्यूटोरियलVIEW ALL [4]

संबंधित प्रश्‍न

Balance the chemical equation.

\[\ce{HNO3 +Ca(OH)2 -> Ca(NO3)2 + H2O}\]


How will you indicate the following effect in a chemical equation?

Exothermic reaction


Translate the following statement into a chemical equation and then balance the equation:

Aluminium metal replaces iron from ferric oxide, Fe2O3, giving aluminium oxide and iron.


What is a chemical equation? Explain with the help of an example.


What is meant by chemical reaction? Explain with the help of an example.


Give one example  of an endothermic reaction.


Write word equation for the following skeletal equation:

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]


What information do you get from the equation H2+ Cl2  →  2HCl ?


Write your observation for the following chemical reaction and name the product formed :
When ammonium chloride is heated with sodium hydroxide.


Write down what you understood from the following chemical reaction.

AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)


What information does the following chemical equation convey?

Zn + H2SO4 → ZnSO4+ H2


Write the balanced chemical equation of the following reaction.

Potassium permanganate + hydrochloric acid → potassium chloride + manganese chloride + chlorine + water


Balance the following simple equation:

K  +   H2O   →   KOH   +   H2 


Balance the following simple equation:

Fe  +   H2O  ⇌   Fe3O4   +   H2 


Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

Cl2 + 2H2O + SO2 → 4HCl + H2SO4


Match the columns.

  Reactants Products Types of chemical reaction
1. MgH2 Mg + H2 Endothermic
2. 2H2S + SO2 3S + 2H2O Oxidation
3. CaO + H2O Ca(OH)2 + heat Exothermic
        Redox

Balance the given chemical reaction as per the instructions below.

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]

Make a list of the elements in the chemical equation.


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`3"Fe"("s") + 4"H"_2"O"("g") -> "Fe"_3"O"_4("s") + 4"H"_2("g")`

  1.  Iron metal is getting oxidised
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  3. Water is acting as reducing agent
  4.  Water is acting as oxidising agent

Which of the following are exothermic processes?

  1. Reaction of water with quick lime
  2. Dilution of an acid
  3. Evaporation of water
  4.  Sublimation of camphor (crystals)

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