Question

A student listed some mixtures and classified them into various types Which mixtures are classified correctly?

(a)W and X
(b)X and Y
(c)Y and Z
(d)W and Z​

Answer 1

Answer:

d ) W and Z

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Answer 2

Let us analyse every option given.

MIXTURE W : Food Colour + Water

• When we add food colour drop-wise into water and allow it to stand for a while after stirring we notice that the whole solution becomes coloured.
• This indicates that all the molecules of food colour have mixed with molecules of water.
• This solution cannot be separated into its individual components by simple purification methods, therefore it is a Homogenous solution.

So OPTION W is correct.

MIXTURE X : Sand + Water

• When we add sand to a beaker of water and allow it to stand for a while, even after stirring, the sand will get deposited at the bottom of the beaker.
• Two separate layers with a defined boundary are formed between sand and water.
• This mixture can be separated into its respective components easily by simply pouring out the water from the top.
• Therefore, this solution can be classified as a Suspension.

OPTION X is incorrect.

MIXTURE Y : Milk + Sugar

• When we add sugar to milk, sugar particles intermix with milk to form a uniform solution.
• This solution cannot be separated into its components by simple purification methods.
• Therefore, it forms a Homogenous solution.

OPTION Y is incorrect.

MIXTURE Z : Rice + Flour

• When we mix rice and flour, the particles of each component are large enough to be distinguished by the naked eye.
• Each particle of each component can be separated by hand and no intermixing of layers takes place.
• Therefore this solution can be classified as Heterogenous solution.

OPTION Z is correct.

Hence the correct option is (d) W and Z.