Question

(vii) Which one of the following is not soluble in water?
(a) Turmeric powder
(b) Common salt
(c) Alum
(d) All are soluble

Answer 1

Answer:

Option (A)

Explanation:

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Answer 2

Among the following, turmeric powder is not entirely soluble in water. (Option a)

• Turmeric has both water-soluble and water-insoluble constituents in them.
• Turmeric is the underground stem called the rhizome of the plant.
• The main constituent of the turmeric powder is curcumin, a bright yellow-colored compound that gives the powder its color, antioxidative, and mild acidic property.
• Curcumin is soluble in alkaline pH but, insoluble in acidic and neutral pH.
• Hence, curcumin is not soluble in water and this makes turmeric powder insoluble in water.