Define Laws of Chemical Combination-Class 11 Chemistry Notes

Laws of Chemical Combination

There are five basic laws that govern the chemical combination of elements. They are as follows:

Law of Conservation of Mass

It states that during a chemical reaction, the mass of the products and reactants will always be equal.

Law of Definite Proportions

It states that every chemical compound will contain a fixed and constant proportion by mass, of its constituent elements. Joseph Proust proposed this law.

Law of Multiple Proportions

It is a rule of stoichiometry formulated by John Dalton.

Gay Lussac’s Law of Gaseous Volumes

Gay Lussac gave this law in the year 1808. This law was properly explained by Avogadro.

Avogadro Law

It states that when the temperature and pressure conditions are the same, gases of equal volumes contain the same number of molecules.

Important Questions

  1. Define mass and write its SI unit.
  2. Calculate the number of atoms in 52 moles of Ar and 52 g of He.
  3. What is the mass per cent of elements present in Na2SO4
  4. What is the difference between 0.50 mol Na2CO3 and 0.50 M Na2CO3

To discover more about this chapter browse through Some Basic Concepts Of Chemistry Class 11 Notes from ANAND CLASSES (A School Of Competitions).

Frequently Asked Questions on CBSE Class 11 Chemistry Notes Chapter Some Basic Concepts of Chemistry

Q1

How to make the subject of Chemistry easy for children?

Chemistry involves many equations and thus conceptual teaching can help students develop an interest towards this subject.

Q2

What is the matter?

Anything has occupies space and has mass can be defined as matter in Chemistry.

Q3

Should a student be good in Maths to solve the CBSE Class 11 Chemistry easily?

Chemistry involves equations and also problems. Basic Maths skills are required to score good marks in Chemistry.

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