Question

Which of these is an example of formation of a substance with a different identity

Answer 1

Uhmm, a hard one High School.. . I will have to go with B:sieving flour and spices.

Answer 2

Answer:  

Mixing sand in water.

Explanation:

MIxing of sand in water is an example of formation of a substance with a different identity. The sand sinks to the bottom in this mixture that's why it is a heterogenous mixture. A heterogenous mixture is a mixture that is not uniform in composition and it includes different substances like solid and  liquid mixture.

While other options are may be homogenous mixture and diluted solution which have same composition and may also have same phase like liquid to  liquid and powder to powder.