Question

Consider The Following Statements And Choose The Correct One(S):

A) A pure substance is one which is made up of only one kind of particles.
B) All the elements and compounds are pure substances.
C) A pure substance cannot be separated into other kinds of matter by any physical process.
D) All of the above​

Answer 1

Answer:

Correct option is

B

(i) and (iii)

Characteristics of pure substance:-

A pure substance contains only one type of particles which can either be atoms or molecules or elements or compounds.

A pure substance cannot be separated into other kinds of matter by any physical process but a mixture can as they are impure substances because they contain more than one particles. Ex: salt solutions.

A pure substance has fixed composition as well as fixed melting and boiling points. Ex: salt.

Pure substances cannot be exemplified by all elements other than nickel because pure nickel is an element containing only one kind of particles.

Hence, the correct ans is (1) and (3).

Explanation:

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