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Question
Give reasons for the following:
Ethyne molecule is linear.
Solution
In ethyne molecule carbon undergoes sp hybridization with two unhybridised orbitals. One sp hybrid orbital of one carbon atom overlaps axially with sp hybrid orbital of the other carbon atom to form \[\ce{C - C}\] sigma bond while the other hybridized orbital of each carbon atom overlaps axially with S orbitals of hydrogen atoms forming σ bonds. Unhybridised orbitals form π bonds
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RELATED QUESTIONS
\[\ce{CO}\] is isoelectronic with
(i) \[\ce{NO+}\]
(ii) \[\ce{N2}\]
(iii) \[\ce{Sncl2}\]
(iv) \[\ce{NO^{-}2}\]
Assertion (A): Among the two \[\ce{O - H}\] bonds in \[\ce{H2O}\] molecule, the energy required to break the first \[\ce{O - H}\] bond and the other \[\ce{O - H}\] bond is the same.
Reason (R): This is because the electronic environment around oxygen is the same even after breakage of one \[\ce{O - H}\] bond.
