31. Which of the following is an example of a homogeneous mixture? A) sand mixed

Question

31. Which of the following is an example of a homogeneous mixture?

A) sand mixed with oil

B) salt dissolved in water

C) table sugar

D) gasoline mixed with water

E) ball bearings in a box

32. Which of the following is an example of a heterogeneous mixture?

A) sand mixed with oil

B) salt dissolved in water

C) air

D) coffee

E) vinegar

33. Which of the following is a chemical change?

A) wood burning in a fireplace

B) ice melting to water

C) chopping wood for a fire

D) sewing a button on a shirt

E) pouring water into a glass

Explanation / Answer

31.
B) salt dissolved in water
salt is uniformly distributed throught the solution.
32.
A) sand mixed with oil
33.
A) wood burning in a fireplace
wood burning to gives CO2, H2O . So it is chemical change

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