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Whiteness of a bleached fabric is measured by

  • A.a whiteness index from reflectance
  • B.the time a water drop takes to absorb
  • C.the weight loss on bleaching it
  • D.a tensile strength test on it

Answer: A

Several indices exist, and a fabric can rank differently on two of them, so the index used should be stated. Absorbency is the test for scouring rather than for bleaching. Two indices can rank the same pair differently.

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