Discussion
Assertion (A) : Cross dyeing and union dyeing are same.
Reason (R) : Both may produce multicoloured effects.
Codes :
Answer: D
(A) is false and (R) is true. Cross dyeing and union dyeing are different processes. Cross dyeing dyes a fabric made of two fibres of different dye affinity in one or more baths so that each fibre takes its own colour, giving a two-tone or multicoloured effect. Union dyeing aims at one uniform shade over all the fibres of a mixed fabric.
So (A), that they are the same, is false. The key treats (R) as true, because both processes work on mixed-fibre fabrics and can be arranged to produce multicoloured effects. The options that make (A) true or (R) false are therefore wrong.
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