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.

Advertisements
Advertisements

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
Advertisements

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.

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

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ २८]

APPEARS IN

लखमीर सिंह Chemistry Part 2 [English] Class 10
पाठ 1 Chemical Reactions and Equations
Exercise 1 | Q 5. | पृष्ठ २८

व्हिडिओ ट्यूटोरियलVIEW ALL [4]

संबंधित प्रश्‍न

What does the symbol (aq) represent in a chemical equation?


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.


Aluminium hydroxide reacts with sulphuric acid to form aluminium sulphate and water. Write a balanced equation for this reaction.


When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.

  1. What do you think substance X is likely to be?
  2. Name the substance which the yellow solid consists of.
  3. Which characteristic of chemical reactions is illustrated by this example?
  4. Write a balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactants and products involved in the chemical equation.

Zinc oxide reacts with carbon, on heating, to form zinc metal and carbon monoxide. Write a balanced chemical equation for this reaction. Name

  1. oxidising agent, and
  2. reducing agent,

in this reaction.


Balance the following equation :

 Fe + O2 → Fe3 O4


Balance the following equation. Also name the product formed.

N2 + H2   →  NH3 


Complete the following equation:

CH3COOH + NaOH → 


What do the following symbol stand for?

2H2 


Write the chemical equation for the following word equation and balance them.

Nitrogen + Oxygen → Nitrogen monoxide


Balance the following equation:

Zn + HNO3 `→` Zn(NO3)2 + H2O + NO2


Write the balanced chemical equations of the following reactions.

chlorine + sulphur dioxide + water →  sulphuric acid + hydrogen chloride


Write the balanced chemical equation of the following reaction.

potassium dichromate + hydrochloric acid → Potassium chloride + chromium chloride + water + chlorine


Name the substance that is getting oxidised in the thermit process.


\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]

Give a reason why the above equation is balanced.


Balance the following simple equation:

K  +   H2O   →   KOH   +   H2 


Write a balanced equation for the following word equation:

Potassium bromide + Chlorine → Potassium chloride + Bromine


What are products? Explain with the help of example.


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.

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

Write names of reactants and products of chemical reaction.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×