A solution of detergent is added to the mixture of oil and water. What will you observe on shaking the above mixture?

Oil floats on the water

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Solution becomes homogeneous

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Solution becomes milky in appearance

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Solution becomes transparent

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Solution

The correct options are
B Solution becomes homogeneous
C Solution becomes milky in appearance
A detergent is a long molecule with two ends of different nature.
One end is water attracting and the other is oil attracting.
When it is added to the mixture of oil and water, oil particles stick to one end and the water to another end.
It spreads throughout evenly and makes the solution homogenous and milky.
In this manner, it also performs its cleansing action when used to clean stains.

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{[C o (H_{2} O)_{5}]}_{2}^{3 +} (p i n k) (a q) + 4 C l^{-} (a q) ⇌ [C o C l_{4}]^{2 -} (b l u e) (a q) + 6 H_{2} O (l)

Explain why -

(i) Oil does not mix in water. However, oil and water become homogeneous if a sufficient quantity of detergent is added.

(ii) Soap cannot be used in hard water.

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