SCIENCE
PHYSICAL SCIENCES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Pure substances consist of substances that have been combined together through physical processes
|
|
|
Pure substances consist of substances that have been separated through physical processes
|
|
|
Pure substances are substances that are always made of one type of atoms
|
|
|
Pure substances consist of substances that have definite physical and chemical properties
|
Detailed explanation-1: -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. More items
Detailed explanation-2: -An element is a pure substance as it cannot be broken down or transformed into a new substance even by using some physical or chemical means.
Detailed explanation-3: -Hence, option (B) is correct, pure substances contain only one kind of particle and pure substances may be compounds or mixtures are true for pure substances.
Detailed explanation-4: -Answer: Ice, iron, hydrochloric acid, calcium oxide, and mercury are pure substances.
Detailed explanation-5: -A pure substance is a form of matter that has a constant composition (meaning it’s the same everywhere) and properties that are constant throughout the sample (meaning there is only one set of properties such as melting point, color, boiling point, etc. throughout the matter).