हिंदी

On What Basis is a Chemical Equation Balanced? - Science

Advertisements
Advertisements

प्रश्न

On what basis is a chemical equation balanced?

संक्षेप में उत्तर
Advertisements

उत्तर

A chemical equation is balanced based on the law of conservation of mass; it states that "matter can neither be created nor be destroyed". If the number of atoms of various elements are different on the reactants' and products' side, it means they are either destroyed or created, which violates the law of conservation of mass.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ १८]

APPEARS IN

लखमीर सिंग Chemistry (Science) [English] Class 10
अध्याय 1 Chemical Reactions and Equations
Exercise 1 | Q 2 | पृष्ठ १८

वीडियो ट्यूटोरियलVIEW ALL [4]

संबंधित प्रश्न

How will you indicate a solution made in water in a chemical equation?


Write complete balanced equation for the following reaction:

Sulphur dioxide (gas) + Oxgyen (gas)   Sulphur trioxide (gas)


What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer.


When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.
(a) What do you think substance X is likely to be?
(b) Name the substance which the yellow solid consists of.
(c) Which characteristic of chemical reaction is illustrated by this example?
(d) Write a balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactant and products involved in the chemical equation.


Balance the following equation. Also name the products formed. 

\[\ce{Ag + S -> Ag2S}\]


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

Carbon   + Oxygen → Carbon dioxide


Balance the following equation:

Pb3O4 → PbO + O2


Write the balanced chemical equation of the following reaction.

copper + nitric acid → copper nitrate + nitric oxide + water


\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of acid required.


The chemical reactions in which heat is liberated are called endothermic reactions.


Answer the following question:
How do acids and bases react with each other? What is the name of the process? What product is obtained from these reactions?


What is thermit process?


Representation of the results of a chemical change – is a chemical equation.

For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓

Answer the following:

What is the indications of the arrow between the reactants and the products and of the arrow pointing downwards at the end.


Give word equation for the following chemical reaction and give the names of the product formed.

\[\ce{CuO + H2SO4 -> CuSO4 + H2O}\]


Give word equation for the following chemical reaction and give the names of the product formed.

Zn + S → ZnS


Balance the following simple equation:

Al   +   O2  →  Al2O3 


Balance the following simple equation:

Mg  +  CO2  →  MgO  +  C


Complete the following blank in the equation as indicated.

\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]

Molecules: 6.02 × 1023 + ______ `→` ______ + ______


Why should a magnesium ribbon be cleaned before burning in air?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×