Laws Of Chemical Combinations

Question 1

Law of Conservation of Mass

Answer 1

Mass of reactants = Mass of products

Question 2

Law of definite proportions

Answer 2

Compound will contain same proportions (when weight is same) irrespective of method of preparation.

Eg :-
Natural CO2 :-
C% - 27.27
O% - 72.72

Synthetic CO2 (same wt as natural) :-
C% - 27.27
O% - 72.72

Question 3

Law of multiple proportions

Answer 3

If 2 elements form more than one compound then, mass of one element that combine with fixed mass of other element are in simple whole no. ratio

Eg
H2O :-
H - 2g
O - 16g

H2O2 :-
H - 2g
O - 32g

Question 4

Gay Lusaac’s Law

Answer 4

Gases combine or produced in a simple whole no. ratio while temp and pressure are constant

Question 5

Avagadro’s Law

Answer 5

Equal volume of gases at same temp contain equal no. of molecules