| (i) It can be worn close to skin because static electricity does not build up readily. |
| (ii) Each fibre is made up of 20-30 layers of coiled cellulose springs. |
| (iii) It has moisture absorbing quality. |
| (iv) It has natural twist that makes it suitable for spinning. |
A) Jute
B) Cotton
C) Wool
D) Nylon
Correct Answer: B
Solution :
Static electricity is the collection of electrically charged particles on the surface of a material. It is because various materials have a tendency of either giving up electrons and becoming positive in charge or attracting electrons and becoming negative in charge. Human dry skin has a tendency to give electrons and become positively charged after it is rubbed with other materials. Cotton is neutral in static charge, it does not readily give or attract electrons when brought in contact or rubbed with skin. Thus, cotton can be worn close to skin and provides comfort. Cotton fibre contains 80-90% of cellulose and each fibre is made up of approximately 20-30 layers of coiled cellulose springs. Cotton has a very good moisture absorbing quality, that's why cotton clothes are preferred in summers. Cotton fibre has a natural twist. This property provides it an uneven surface, which increases inter-fibre friction and enables fine cotton yarns of adequate strength to be spun.
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