Distillation is suitable because the liquids are miscible and their boiling points differ by 30 °C. The liquid A, having the lower boiling point, vaporises first and is then condensed separately.
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Yes, cooking oil and water form separate layers because they are immiscible and oil is less dense. Oil forms the upper layer. A separating funnel can separate the two layers by draining water first.
Option (iii) is correct. Assertion A is true because transparent solutions do not show the Tyndall effect. Reason R is false because solution particles are smaller than 1 nm, not larger than 100 nm.
(i) Total mixture is 500 g. Sugar concentration is 15 percent, flour is 84 percent and sodium hydrogencarbonate is 1 percent by mass. (ii) Copper is 84 g and zinc is 36 g.
Option (iii) is correct. Air with dust particles and starch with water show the Tyndall effect because their dispersed particles scatter light, making the path of the light beam clearly visible to the observer nearby.