uestions What is meant by a substance? 2. List the points of differences between homogeneous and heterogeneous mixtures
Answers
Answer:
A substance is a matter that has definite properties and composition. Every pure compound and element is a substance. ... Pure substances can be divided into two categories – elements and compounds
Answer:
1)substance is a pure single form of matter. It cannot be separated into other kinds of matter by any physical process. For example: sugar, sodium chloride
2) Homogeneous mixture
(I) Homogeneous mixtures have uniform composition throughout the mixture.
(II) The whole mixture is in same phase.
(III) Components are not visible to the naked eye.
(IV) Components cannot be separated easily.
Eg.: Sugar + Water → Sugar solution
Heterogeneous mixture
(I) Homogeneous mixtures have uniform composition throughout the mixture.
(II) The whole mixture is in same phase.
(III) Components are not visible to the naked eye.
(IV) Components cannot be separated easily.
Eg.: Sugar + Water → Sugar solution (I)
Heterogeneous mixture have composition which may vary from point to point.
(II) Substances can be of two phases and layers may separate.
(III) Component of mixture can be seen easily.
(IV) Components can be separated easily.
Eg.: Salt + Sand