Question 7 - MCQs from Past Year Papers - Chapter 4 Class 10 - Carbon and its Compounds

Transcript

In the soap micelles (a) the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster. (b) ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster. (c) both ionic end and carbon chain are in the interior of the cluster. (d) both ionic end and carbon chain are on the exterior of the cluster. Answer Soap micelle is the structural unit of soap. It is a spherical aggregation of soap molecules. It consists of a polar (hydrophilic) head and a non polar (hydrophobic) tail. STRUCTURE OF A SOAP MICELLE (Loves water but does not like oil) Hydrophilic Head Hydrophilic Tail Does not like water but loves oil) Soap Molecule Micelle Water The ionic ends remains outward of the micelle and interacts with water because it is hydrophilic whereas the hydrocarbon tail is towards the inside because it is hydrophobic and does not interact with water. Therefore, the correct option is (a) the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior.