Chapter: 2021· Chemistry

The right option for the statement. “Tyndall effect is exhibited by”. is: (1) Urea solution (2) NaCl solution (3) Glucose solution (4) Starch solution

The right option for the statement. “Tyndall effect is exhibited by”. is:
(1) Urea solution
(2) NaCl solution
(3) Glucose solution
(4) Starch solution

Doubtly Asked 11 Nov 2021 Updated 23 Oct 2026 Student doubt Save WhatsApp Report

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(4) Starch solution

Tyndall effect shown by starch solution

Doubtly · 11 Nov 2021 Report

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Answer: (4) Starch solution

The Tyndall effect is the scattering of light by particles of colloidal size (about 1–1000 nm), which makes the path of a light beam visible.

Starch is a macromolecule, so its "solution" in water is a colloid (a lyophilic sol) and it scatters light. Urea, NaCl and glucose form true solutions: their particles (molecules or ions) are smaller than 1 nm and cannot scatter light, so they do not show the Tyndall effect.

Doubtly AI · 23 Oct 2026 AI-verified · Oct 2026 Report

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The right option for the statement. “Tyndall effect is exhibited by”. is: (1) Urea solution (2) NaCl solution (3) Glucose solution (4) Starch solution

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