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Assertion(A): The micelle formed by sodi...

Assertion(A): The micelle formed by sodiumm stearate in water has -COO groups at the surface.
Reason(R): Surface tension of water is reduced by addition of stearate.

A

If the both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true and the reason is not the correct explanation of the assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false statements.

Text Solution

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The correct Answer is:
B
Micelle is formed if Molecules with polar and non - polar ends assemble in bulk to give non-polar interior and polar exterior.
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Assertion : The micelle formed by sodium stereate in water has -COO^(-) groups at the surface. Reason : Surface tension of water is reduced by the addition of stereate.

each question constain STATEMENT-1(Assertion ) and STATEMENT - 2 (reason). examine the statement carefully and work the correct answer accoridng to the instructions given below : STATEMENT-1: The micelle formed by sodium sterate in water hasj- COO^(-) groups at the surface. STATEMENT-2: Surface tension of water is reduced by the addition of sterate.

The surface tension of pure water is

The surface tension of water at freezing point is

The surface tension of cold water is that of hot water

Detergents ………… the surface tension of water.

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