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JEE Advanced2008Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Paragraph: There are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms large number of complexes with transition metal ions. Hybridisation easily explains the ease of sigma donation capability of NH ₃ and PH ₃ . Phosphine is a flammable gas and is prepared from white p

Options

  1. Abetween NH ₃ and PH ₃, NH ₃ is a better electron donor because the lone pair of electrons occupies spherical '
  2. Bbetween NH ₃ and PH ₃, PH ₃ is a better electron donor because the lone pair of electrons occupies sp ^3 orbit
  3. Cbetween NH ₃ and PH ₃, NH ₃ is a better electron donor because the lone pair of electrons occupies sp ^3 orbit
  4. Dbetween NH ₃ and PH ₃, PH ₃ is a better electron donor because the lone pair of electrons occupies spherical '

Correct answer

C. between NH ₃ and PH ₃, NH ₃ is a better electron donor because the lone pair of electrons occupies sp ^3 orbit

Step-by-step solution

NH ₃ is better electron donor because the lone pair of electrons occupies sp ^3 -orbital and is more directional.

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