Question

While driving during peak winters the driver was repeatedly wiping the glass of front window as there was obstruction of view:

(a) Why is the obstruction caused? Identify which category the substance causing the obstruction falls under: colloid, suspension, or solution?
(b) Write any two properties of the category identified.

Answer 1

Answer:

Barium Sulfate is the sulfate salt of barium, an alkaline, divalent metal. Barium sulfate is quite insoluble in water, and is used as a radiopaque agent to diagnose gastrointestinal medical conditions. Barium sulfate is taken by mouth or given rectally. (NCI04)

NCI Thesaurus (NCIt)

Barium sulfate appears as white or yellowish odorless powder or small crystals. Mp: 1580°C (with decomposition). Density: 4.25 -4.5 g cm-3. Insoluble in water, dilute acids, alcohol. Soluble in hot concentrated sulfuric acid. Used as a weighting mud in oil-drilling, in paints, paper coatings, linoleum, textiles, rubber. Administered internally ("barium cocktail") as a radio-opaque diagnostic aid.

Explanation:

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