Given below are statements about some molecules/ions. Identify the CORRECT statements. (i) O 2 − , N 2 , NO all contain same number of unpaired electrons. (ii) Among B 2 H 6 , Al 2 H 6 two

Question

Given below are statements about some molecules/ions.

Identify the CORRECT statements.

(i) $O_{2}^{-}$ , $N_{2}$ , $NO$ all contain same number of unpaired electrons.
(ii) Among $B_{2} H_{6}$ , $Al_{2} H_{6}$ two, three-centre-two electron bonds present in each
(iii) The bond order of $O_{2}^{2 -}$ and $F_{2}$ is same.
(iv) The formal charge on the central oxygen atom of ozone is -1.
(v) In $NO_{2}$ , all the three atoms satisfy the octet rule, hence it is very stable.
Choose the correct answer from the options given below :

TestHub · Accepted Answer

(i) False: O₂⁻ and NO have 1 unpaired electron each, N₂ has none.
(ii) True: B₂H₆ and Al₂H₆ each contain two 3-centre-2-electron bonds.
(iii) True: O₂²⁻ and F₂ both have bond order 1.
(iv) False: the central oxygen of ozone carries +1 formal charge.
(v) False: NO₂ is an odd-electron molecule, nitrogen does not complete its octet.
Hence option (B).

Chemistry - CHEMICAL BONDING Question with Solution | TestHub

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