Classify the following mixtures as homogeneous or heterogeneous: (a)Tincture of iodine (b) Smoke (c) Brass (d) Sugar solution

Q. Classify the following materials as homogeneous and heterogeneous mixtures.
(soda-water, wood, air, soil, petrol and water mixture, alcohol and water mixture, chalk and water mixture, sand and water mixture, sugar and water mixture, pumice stone, smoke, salt and water mixture, cough syrup, gun powder).

Q. The 'sea water' can be classified as a homogeneous mixture as well as a heterogeneous mixture ? Comment.