7th Class Science Sample Paper Science Sample Paper - 7

  • question_answer
    What are the three grades of the silk produced?

    Answer:

    Three grades of silk obtained from a cocoon are:
    (i) Reeled silk: It is the unwound fibres and forms the finest quality of silk.                                                  
    (ii) Spun silk: It is the carded or combed silk from left overs after the reeled silk. It constitutes an inferior quality. It is slightly honey coloured.                                                                                                                    
    (iii) Nail silk: Still shorter fibres left behind after carding constitute an even inferior quality of silk. It is a richly textured rough silk.                     


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