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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

The halides which can react with water or undergo hydrolysis are P C l 5 , S i C l 4 , B C l 3 , C C l 4 and S F 6

Options

  1. AP C l 5 , S i C l 4 , B C l 3 , C C l 4 and S F 6
  2. BP C l 5 , S i C l 4 , B C l 3 and C C l 4
  3. CP C l 5 , S i C l 4 and B C l 3
  4. DP C l 5 and S i C l 4

Correct answer

C. P C l 5 , S i C l 4 and B C l 3

Step-by-step solution

Sometimes, when maximum covalency is obtained, the halides become inert to water. Thus, S F 6 is stable. This is because S F 6 is coordinately saturated and sterically hindered. Thus, S F 6 is inert to water, because of kinetic rather than thermodynamic factor. C C l 4 cannot undergo hydrolysis as carbon does not have vacant d-orbitals to extend its covalency. Rest other P C l 5 , S i C l 4 and B C l 3 can undergo hydrolysis as follows P C l 5 + 4 H 2 O → H 3 P O 4 + 5 H + C l - S i C l 4 + 4 H 2 O → S i ( O H ) 4

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