Q22 / 90 · JEE Main 2014 (19 Apr Online) · Chemistry

Which of these statements is not true ?

  • A
    LiAlH4 is versatile reducing agent in organic synthesis.
  • Correct answer
    B
    NO+ is isoelectronic with O2
  • C
    Boron is always covalent in its compounds
  • D
    In aqueous solution, the Tl+ ion is much more stable than Tl (III)

Solution

(i) LiAlH4 is a versatile reducing agent
(ii) NO+ (14 electrons), O2(16 electrons) not isoelectronic
(iii) ​Tl+ is more stable due to Inert pair effect
(iv) Boron compounds are ionic as well 

B 2 O 3 + 2 NaOH → 2 NaBO 2 + H 2 O  
                                 (Sodium meta Borate)            

Hence, the correct answer is option: 'B'.

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