$(a)$ What is the law of constant proportions? Explain with the help of an example.
$(b)$ Which postulate of Dalton's atomic theory is in agreement with this law?
$(b)$ Which postulate of Dalton's atomic theory is in agreement with this law?
(N/A) The law of constant proportions states that in a chemical substance, the elements are always present in definite proportions by mass.
Example: In water $(H_2O)$, the ratio of the mass of hydrogen to the mass of oxygen is always $1:8$, regardless of the source of water.
$(b)$ The postulate of Dalton's atomic theory that is in agreement with this law is: "The relative number and kinds of atoms are constant in a given compound."
Example: In water $(H_2O)$, the ratio of the mass of hydrogen to the mass of oxygen is always $1:8$, regardless of the source of water.
$(b)$ The postulate of Dalton's atomic theory that is in agreement with this law is: "The relative number and kinds of atoms are constant in a given compound."
Explore More
Similar Questions
Which of the following species have $18$ electrons? $Ca^{2+}, K^{+}, Na, Cl^{-}, Ar$. Also,state the reason why the chemical properties of all isotopes of an element are similar.
Easy
View Solution$A$ silver ornament of mass $m \, g$ is polished with gold equivalent to $1\%$ of the mass of silver. Compute the ratio of the number of atoms of gold and silver in the ornament.
Difficult
View SolutionName the elements represented by the following symbols:
$(a)$ $Au$
$(b)$ $Ag$
$(c)$ $Hg$
$(d)$ $Sn$
$(a)$ $Au$
$(b)$ $Ag$
$(c)$ $Hg$
$(d)$ $Sn$
Easy
View SolutionWith a labelled diagram,describe an activity to demonstrate the law of conservation of mass.
Medium
View SolutionCompute the difference in masses of one mole each of aluminium atoms and one mole of its ions. (Mass of an electron is $9.1 \times 10^{-28} \,g$). Which one is heavier (in $,g$)?
Difficult
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo