Question

Classify the following into elements, compounds and mixtures.

(a) Sodium
(b) Soil
(c) Sugar solution
(d) Silver
(e) Calcium carbonate
(f) Tin
(g) Silicon
(h) Coal
(i) Air
(j) Soap
(k) Methane
(l) Carbon dioxide
(m) Blood

NCERT Class 9th Science Ch 2 Is Matter Around Us Pure

Answer 1

Elements:

An element is a substance which cannot be split up into two or more simpler substances by the usual chemical methods of applying heat, light , or electric energy.

An element cannot be split up into two or more simpler substances because it is made of only one kind of atoms.

Compounds:

A compound is a substance made up of two or more elements chemically combined in a fixed proportion by mass.

A compound cannot be separated into its component by physical methods.

Mixtures:

A mixture is a substance which consists of two or more elements are compounds not chemically combined together. All the solutions or mixtures.

Solution:

ELEMENTS:

Sodium(Na)
Silver(Ag)
Tin(Sn)
Silicon(Si)

COMPOUNDS:

Calcium carbonate(CaCO3)
Soap(C₁₇H₃₅COONa)
Methane(CH4)
Carbon dioxide(CO2)


MIXTURES:

Soil
Sugar Solution
Coal
Air
Blood

==================================================================

Hope this will help you....

Answer 2

sodium (E)
soil(M)
sugar solution(M)
silver(E)
calcium carbonate(C)
tin(E)
silicon(E)
coal(M)
air(M)
soap(M)
methane(C)
carbon dioxide(C)
blood(M)