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JEE Main202324 Jan 2023Morning ShiftChemistrys Block ElementsActual

Reaction of BeO with ammonia and hydrogen fluoride gives ' A ' which on thermal decomposition gives BeF 2 and NH 4 F . What is ' A ' ?

Options

  1. AH 3 NBeF 3
  2. BNH 4 2 BeF 4
  3. CNH 4 BeF 3
  4. DNH 4 2 Be 2 F 6

Correct answer

B. NH 4 2 BeF 4

Step-by-step solution

Beryllium ion forms tetra coordinated complexes readily due to the presence of 2 s   and   2 p empty subshells as shown below.

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