The small strip of red colored paper is pasted on the inner side of the test tube. The content of the test tube is given alongside.
Observe the color paper through the other side of the test tube through the liquid.
A
The colored strip is clearly seen in A but not in B and C.
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B
The colored strip is clearly seen in B but not in A and C.
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C
The colored strip is clearly seen in C but not in A and B.
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D
The colored strip is clearly seen in A and B but not in C.
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Solution
The correct option is A
The colored strip is clearly seen in A but not in B and C.
Explanation of correct option
True Solution: A homogeneous mixture of two or more substances is called a solution. Usually, we think of a solution as a liquid that contains either a solid or a liquid or a gas dissolved in it. However, this is not true. We can also have a solid solution and gaseous solution as in the case of alloys and air respectively.
A true solution is always clear and transparent, i.e., light can easily pass through it without scattering.
Example: sugar in water.
Explanation of Incorrect option
Colloidal Solutions: A heterogeneous solution in which the particle size is between 10-7 cm to 10-5 cm, such that the solute particles neither dissolve nor settle down in a solvent is called a colloidal solution.
when a strong beam of light is passed through a colloidal solution and viewed at right angles with the help of a microscope, the path of light shows up as a bright cone of bluish light.
Example: White of an egg. Starch Paste, Milk
Suspensions: A heterogeneous mixture of insoluble particles of solute, spread throughout a solvent, is called a suspension. The particle size (diameter) in a suspension is more than 10-5 cm. The particles have a tendency to settle down at the bottom of the vessel and can be filtered out because their size is bigger than the size of the pores of the filter paper. More scattering takes place in suspensions, because of the bigger size of particles.
