Which of the following mixtures are correctly classified as homogeneous. Class 9

Which of the following mixtures are correctly classified as homogeneous. Class 9

Revise, Reflect, Refine (Page 90-93)

Question 1.

Which of the following mixtures are correctly classified as homogeneous (Hm) and heterogeneous (Ht)? Choose the correct option. Class 9

(i) Air — Hm, Milk — Ht, Sugar solution — Hm, Smoke — Hm

(ii) Brass — Ht, Fog — Ht, Vinegar — Ht, Muddy water — Hm

(iii) Copper sulfate solution — Hm, Salt solution — Hm, Milk — Hm, Bronze — Hm

(iv) Muddy water — Ht, Milk — Ht, Blood — Ht, Brass — Hm

Answer:

(iv) is correct. Muddy water - Ht (heterogeneous; particles visible, settle on standing). Milk - Ht (heterogeneous/colloid; appears uniform but is actually heterogeneous at particle level). Blood - Ht (heterogeneous/colloid; contains cells suspended in plasma). Brass - Hm (homogeneous alloy of copper and zinc with uniform composition throughout).