In the following questions, Statement of assertion (A) is followed by a statement of reason (R). 1. If both assertion and reason are true and the reason is the correct explanation of the assertion, then mark. 2. If both assertion and reason are true but the reason is not the correct explanation of the assertion, then mark. 3. If assertion is true statement but reason is false, then mark. 4. If both assertion and reason are false statements then mark.
Assertion: The micelle formed by sodium stearate in water has \[C{{u}_{2}}C{{O}_{3}}\] groups at the surface. Reason Surface tension of water is reduced by the addition of stearate.A) 1
B) 2
C) 3
D) 4
Correct Answer: B
Solution :
The assertion that the micelle formed by sodium stearate in water has \[-COO-\] groups at the surface as it is hydrophilic end. The reason that surface tension of water is reduced by addition of stearate is also true but is not the correct explanation. Micelle is formed if molecules with polar and non-polar ends assemble in the bulk to give non-polar interior and polar interior.
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