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KCET2017Chemistryp Block Elements (Group 15, 16, 17 & 18)

For a reaction ( 1 2 ~A 2 ~B ) rate of disappearance of ( A ) is related to rate of appearance of ( B ) by the expression

Options

  1. A( -d[A] d t =4 d[B] d t )
  2. B( - d [ A ] d t = 1 4 d [ B ] dt )
  3. C( - d [ A ] d t = 1 2 d [ B ] dt )
  4. D( -d[A] d t = d[B] d t )

Correct answer

B. ( - d [ A ] d t = 1 4 d [ B ] dt )

Step-by-step solution

For the given reaction, ( 1 2 A 2 B ) or ( A 4 B ) Rate of disappearance of ( A=- d [ A ] dt ) Rate of appearance of ( B=- d [ B ] dt ) Rate of disappearance of ( A= ) Rate of appearance of ( B ). Therefore, ( - d[A] d t = 1 4 d[B] d t )

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