Question

Which criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension?
 whether its composition is uniform and transparent                                                                                                                                       whether the particles remain suspended for an extended period of time 
whether it can be separated into simpler substances through physical separation techniques
whether the ratio of components is fixed

Answer 1

I think the correct answer is the second option. The criteria that are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension would be whether the particles remain suspended for an extended period of time

Answer 2

Answer:

The correct answer is that whether it can be separated into simpler substances via physical separation procedures.

Explanation:

A mixture, which is not uniform in the composition is known as a heterogeneous mixture. The examples of heterogeneous mixtures are colloids and suspension. In suspensions, the components get distinguished itself through simple physical separation techniques, while in colloids the constituents do not get distinguished as the colloids prevail in liquid, solid, or gaseous state.  

If a suspension is permitted to stand the particles will get distinguish. A colloid is an intermediate between a suspension and a solution. A suspension will separate out, however, a colloid will not.