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JEE Main202226 Jun 2022Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Consider the following reaction : A + alkali → B Major Product If B is an oxoacid of phosphorus with no P - H bond, then A is

Options

  1. AWhite P 4
  2. BRed P
  3. CH 3 PO 3
  4. DP 2 O 3

Correct answer

B. Red P

Step-by-step solution

P 4 + 3 NaOH + 3 H 2 O → PH 3 + 3 NaH 2 PO 2 Red   P   +   Alkali   → H 4 P 2 O 6 White Phosphorous react with alkali metal hydroxide to form phosphine and a salt of H 3 PO 2 - . While red phosphorous react with alkali to give oxoacid of phosphorus with no P - H bonds.

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