Question

Which statement about substance classification is FALSE?

Select one:
a. Pizza is a mechanical mixture because you can see its components with the eye.
b. Milk is a pure substance because it is a solution of different molecules.
c. Solutions as well as pure substance can be dissolved as homogeneous.
d. A cake mixture may look like a pure substance but it is not because it contains different types of particles such as flour, sugar, and baking soda.

Answer 1

Answer:

A-TRUE,B-TRUE,C-FALSE,D-TRUE

Answer 2

a .  Pizza is a mechanical mixture because you can see its components with the eye.   - TRUE .

  REASON :

•    Mechanical mixtures have two or more particle types that are not mixed evenly and can be seen as different kinds of matter in the mixture.

 b .  Milk is a pure substance because  it  is  a  solution  of  different molecules. - FALSE .

   REASON :

•    Milk is not a pure substance, it is a colloidal mixture.

•    Milk contains water, proteins, fat, solid, and hence it is not a pure substance .

c . Solutions as well as pure substance can be dissolved as homogeneous. - FALSE .

    REASON :

•      All solutions are considered homogeneous because the dissolved material is present in the same amount throughout the solution.
•     Pure substance cannot be dissolved as homogeneous .

d . A cake mixture may look like a pure substance but it is not because it contains different types of particles such as flour, sugar, and baking soda. -

TRUE .

    REASON :

•      A Cake is not a pure substance , it is a colloidal mixture .
•      A Cake contains different types of particles such as flour, sugar, and baking soda.
•      Hence it is not a pure substance .